As a League of legends pro, these are just my personal favorites to play, if you started up I suggest trying these. I usually do really good with them.
Katarina - my personal best, usually when i play her i go 30-2 and just wreck teams. I already posted a video of me playing with her quickly in a previous post.
Lux - just sitting back and shooting lasers, pretty good damage. I just started playing her and i'm not as good with her as my katarina, but shes pretty fun.
I usually like female characters for some reason. If they can be in the back its much easier for me. I also do alright with Caitlyn, Miss Fortune, Xin Zhao.
I'd like to write a League of Legends guide on some of these champs.
If you play add me as a friend and we could do some games. Account name is Higherr, add me and ill accept.
What are some of your favorites?