After what seemed like years of Rageguy (aka FU Guy) — well, at least "Internet years" which are kind of like dog years — a meme is finally emerging that takes the opposite stance.
FU Guy was all about pent-up rage due to little frustrations. F' Yea Guy is all about feeling good about our little successes.
You can find a ton of "Fuck Yea." images on the site Know Your Meme, which, coupled with the fact that I am talking about it here, probably means the meme is officially past its prime.
But not before I contribute one of my own above.