if twilight cast play Quidditch what position, in your opinion will fit for each of them? (go wild xD)

Cast, hoặc characters? I'll go with characters..

Chasers: Rosalie, Carlisle, Jasper
Beaters: Emmett and Jacob- seem the strongest.
Keeper: Alice
Seeker: Edward- mostly because he's considered the fastest. If he doesn't do well, he and Jasper will trade.

Bella isn't going to play because she's too distracting to the players (mostly Edward). She can watch from a distance though.