The answer for this one is basically the same answer as how much money you need to be happy. In both case, you get a very different answer depending on a subtle change in the question.
Ie, if you ask, which elo bracket would make most people happy, the likely answer is a little better than average. Similarly, if you ask about income, in the us it's about $75k.
OTOH, if you ask different people what elo makes you most happy, the guys who have a stable mid range elo would reply the same (a little above average), but the guys with the very high elos would probably say: the top elo bracket. In other words, they are there because either that's what makes them happy, or being in a lower elo bracket makes them really unhappy.
Similarly, if you survey a rich guy in the US, chances are he isn't going to be more happy with his lot than the guy making $75k per year, but if the rich guy was making 75k per year, chances are he'd be really unhappy.
Ps, no matter which elo bracket you are playing in, you'd be much happier if the people on your team are friendly and of good cheer. I've found those types at all elo brackets. The problem often comes when frustration builds because of a disparity in skills and tactics.
A nice high elo guy who is used to playing really aggressively is going to be really frustrated playing with teammates who are not. A fun loving guy who likes to play casually is going to be pissed off at people who can put 20 ptsx of damage into his ct from half a kilometer away the very second he pokes his head out from cover. They'd both be much happier in the elo bracket they are used to.
Edited by JigglyMoobs, 27 June 2014 - 02:58 AM.