Typically everyone will be happier when the value of the asset they hold increase tremendously and they can pull out 10× profits from their initial investment or more. The bear market is a means to profit from the bull market, a means to an end.
Both are important factors in any market to ensure there is a balance, any asset that has constant growth over very extended periods of time will draw skepticism from investors.

I am more of a hodl guy, through the different markets.
If you know what you're doing, you can short Bitcoin when the price rises and drops to get more. If you do not know what you're doing just hold till you reach your desired profits.

Both the bull market and the bear market are very important because in an investment there must be a time when you have the opportunity to make profit,you just have to take that profit and still have your investment running. Someone who has zeal to hodli his bitcoin will love the bear market more than the bull run because it is an advantage for them to accumulate more bitcoin to their investment portfolio. And those who have invested to sell off during the bull run will always be eager for the bull run to come. But the fact with bitcoin investment is that you need to buy during the bear because that is when people who don't have much on them can use the opportunity to invest in bitcoin. I prefer the bear market more than the bull since I want more bitcoin than making profit.

Every investor or trader will always want to buy goods at a cheap price and sell them at a high price. The bear market is a time to buy at a cheap rate, while the bull run is a  time to sell and make a profit. Both of them are very important to make the market balanced. Each of the sessions serves as an opportunity or threat to different people. Some persons might make a profit when they sell above their buying price, while others loose because thy sell below the cost price because of FUD or other issues. To answer your question I will love to accumulate when the price is low and sell during the bull run, so I prefer both.

As an investor, I'd say that I prefer the bull run better than the bear market. Gives me more opportunities to grow my portfolio, saves me from problems as most cryptocurrencies in the market are going upwards during those periods, and there are an abundance of profit in the industry, you just need to find the right tokens to take up. However, as someone who have built and developed stuff for this industry, I say that if you're building or developing something, it's best to do so during the bear market. There's no pressure to release it right away, leading to your project coming up as best as it can be, lower fees and you pretty much have all the time in the world cause you're in no rush. Plus, you have the opportunity to release your project soon as the bull run arrives, which gives you the prime leverage to pick up funding and all that important stuff.

I say that these two periods in the industry are beneficial to different groups of people, having experienced both, I don't particularly prefer one over the other, but for all its worth it's really nice getting money so I'd choose bull over bear.  

Who don't love to see their portfolio is pumping like a rocket?
Some people like bear market but their intention is to see the next bull market.
If you see the scenario between bull and bear market you will see mostly people like to invest more in Bull season and they unfortunately sell by being panicked in the bear market. But the right decision should be entering in Bear season and grab profits in Bull season. In Bear season it's the perfect time to buy but they just feel unsafe and predict a huge crash in the market. That's some of them can't make a right decision.
In short I obviously prefer Bull market to grab profits and Bear market to accumulate more. Between them I would like to choose Bull market because it realize us how much potential Bitcoin is.

Hmm, What kind of question is this? in OP's Tittle as both had their own importance for the investor as without a Bear market you cant accumulate, and without a Bull market you cant book profits on the accumulation. So both are equally important this Question is like Water Vs Oxygen, Which will you prefer Obviously both have their own importance and role so both are required.

Besides leaving the Basic question yes if I have already done with accumulation I will prefer the Bull market and those who are entering the market will prefer the Bear one because they want to fill up most of the bags cheaply.

The good traders use both as a chance then blame it.Because bear run is wonderful chance to buy at cheap price, where the bull run is enough to make a good profit in a short time.Only the new people not easy to find the correct time to buy the bitcoin Or sell.The panic selling is the biggest problem of the new traders.When the market is started to reduce some value due to the market crash,the panic people sell their valuable coins at low price.They need to analysis the market well as comparing to old charts.

Is scientific proof required for this?

It's natural because everyone wants to be successful; hence, if the Bitcoin price rises, Bitcoin investors and even people who invest in altcoins will be pleased because everyone wants to profit from their investment.
As a result, most individuals enjoy both the bear market and the bull run since each has advantages; we buy during the bear market and sell during the bull run.

Some investors have been holding Bitcoin for a long time and will continue to do so regardless of market conditions. Those are the true Bitcoin investors since they believe in Bitcoin and have the feeling that they will never lose their money owing to their trust in the entire Bitcoin process, whilst others are only interested in making a profit for short-term investments.

Bull vs Bear market and basic characteristics of the Bitcoin market and at its impact on individuals is depending on the financial position of the individual and as a cryptocurrency investor or market speculator what becomes our position is what asset we are holding at every market position in the sense that.

Those who have all the money in Bitcoin and are holding large Bitcoin Units will always prefer the bull market because the bull market is the market condition that will yield them the desired profits, but those who have their funds in fiat currency and want to buy some Bitcoin will always prefer the market to ve in the bear season before opening their own position.

So for that, we have to apply the market to individuals standing positions at every point in time, so it is hard to make a stand on this topic since both play a significant role in our investment life.

There are cycles that you can actually take advantage of to accumulate bitcoins and get out of your investment positions. The bearish phase experienced by bitcoin is a good time to accumulate, while you can sell it during the bullish phase. Both of these cycles are expected by investors, of course because they will never be on one road forever without stopping and getting out.

A bull market is important for whoever you are to be able to sell your investment and make a profit, but a bear market is expected by those who start to reorganize their investment plans when bitcoin is about to be in its next bullish cycle.