I like seeing Zencash further down the list on whattomine. Am I being selfish?

It sometimes jumps up quite high for no apparent reason on the immediate profitability measurement. Sometimes the difficulty drops 30 odd percent in the space of a few blocks (yesterday I saw it at 350ish before going back to high 600's), my guess is nicehash miners going to another coin, but still don't know why the swing would be so large!
But yes, I prefer to be able to mine more zencash at lower difficulty regardless of price, because I like zencash for the long haul!