Which Champion Should I Buy Next?

maokai.

now i usually dont play tanks because i find it boring, but maokai is a special tank. when i play maokai its SO fun. throwing little babies and jumping into the fight. get maokai.

It depends where you want to play if support i suggest Thresh. He is hard to play, but when you master him, bot lane wouldn't be hard for you.

Its not a good comparison. I don't know what you own, so since thresh/braum are up there, I'll assume support? I'll just go with thresh because he is the best generic support. If you master him you can make plays for days. Braum is okay in his own right, but as he is melee requires more finese in lane and he has some annoying counters(Morgana).

Maokai is a top atm, works well as a jungler too. If you want a top get him instead. If support though get thresh.