My main, who I'll take top, mid, or support is Cho'gath, the tank mage. His harrass and staying power is phenominal.
I really want his gentleman skin, which reminds me alot of @Scarilian. xD
My jungle champ, and my second favorite champion, is Nocturne, the assassin fighter.
I do have his Frozen Terror skin, which I bought alongside him a year ago as my first champion.
When I'm playing jungle and the rest of the team is focused on attack damage, and not ability power, I'll play as Fiddlesticks, the mage support, to balance the team's damage types.
I rarely play ADC bot, since I'm a bit too aggressive and end up dying without a good support. When I do though, I have Jinx, the marksman.
When I'm bored or tilted with Cho'gath but get stuck with Mid or Support, I have Veigar, the mage, as an alternate option.
I've got the superb villian skin for Veigar, which I think is absolutely perfect.
I'm summoner level 30, and if you'd like to connect in-game, send me a PM and I'll get in touch.