I was always told that you shouldn't really ever use a bitcoin address twice, for security and privacy reasons.   

Quote from Bitcoin wiki  "Address reuse refers to the use of the same address for multiple transactions. It is an unintended practice, abusing the privacy and security of the participants of the transactions as well as future holders of their value. It also only functions by accident, not by design, so cannot be depended on to work reliably"

https://en.bitcoin.it/wiki/Address_reuse

Okay. I will try to type up my old address which I used for about a year. 1Kok3 ... K ... 3? Okay. Now I check my wallet and this is the full address 1K3JttmxEQkKZGvdm9pSm6Rx8R42ftKok3. Haha. I misplaced the letter and only managed to remember six characters.

Now. Let's try my current Bitcoin address - using it since September. 1JTKing ... vs. Only manage to remember the first five characters which is vanity and last two. Full address is 1JTKingdNGmCfbP8HCbhenoxRQuy8tqZvs. .

Correct. It would be much more useful if someone learns their private key rather than Bitcoin address. In case that something really bad goes down, knowing your address will not help you do anything. Knowing your private key will.

I only remember 2 last digit of my bitcoin addreess.

It's not necessary to remember our biticoin address anyway.

Lol I can't

I got a couple so I can't remember them all on the top of my head. Copy pasta is my friend.

Nope too many to remember. Most of us have multiple addresses for various reasons, so yeah not suprised not all of us know it.

I currently have a PDF with 404 addresses and none of them close to memorized.

No I don't. I have so many different ones I lost track of them. But I remember all the passwords and important security things I put in place to store them safely. Hope that's enough!

no, i can't write down my full address with no errors
i am always using copy and paste to avoid me from making mistake to do any transactions
maybe that's why until now i am only remember 2 digits of first number and 4 character of words at last

well no i didnt memorise any of my address and i am sure no one in all the 100000000 peoples who are using the bitcoin stuff also didnt memorised it too because we cant memorise it