Why is meta so... meta?
I've been playing League since march a couple years ago, about when Zac came out. I was still noobish, so I just played whatever and prayed I wouldn't do too bad. I eventually leveled the account up to the 20's, and started hearing so much about meta this, meta that, that champs not meta, that build isn't meta...
I quickly informed myself on what the meta is, what build and champions are and aren't meta, etc. But... Why are those champions meta, and others aren't?
In the current meta, we have adc supp bot, usually some kind of fighter or tank top, apc's or assassins mid, and (insert random jungler) in the jungle. The only variation of this kind of thing that I ever really see in pro's is lane swaps and a Lulu top every once in a while. (lookin at you Dyrus) Mid is now filled with the same mid laners almost all the time, and the same can be said for bot. People like Gragas, Karthus, Brand, Malzahar, and Viktor just don't usually pop up, simply because they're not 'meta' enough. But WHY are they not meta?
Most of this boils down to a balance between mechanics, damage and mobility. This is what determines what's meta and what's not.