I like midding too, because I can only mid and AD carry (and maybe solo with jayce). My favourite champs are:
-Orianna
-Viktor
-Ahri (2stronk)
-LeBlanc
-Zyra
-Katarina
They are preety easy to play with (excepting orianna) and they have really great damage. But still, cannot into jungle, hecarim 0/5 in 10 mins, died from golem once, 4 fail ganks. Same with lee sin -_-. Btw, any tips to Twitch?