Katniss - I agree, but I thought Anna Popplewell was playing her anyway.
Peeta - No! No! No! Alex Pettyfer fits the description the best, and I can see him as Peeta.
Gale - Ha, no. I think someone with a darker look needs to play him. He looks like more of a Peeta even though he's not blonde.
Haymitch - No, I imagine Haymitch with white hair with a wiry frame.
Effie - Yeah, I could see her as Effie. :)
Thresh - Hmm... not really. I don't know.
Rue - No! Oh my god, no.
Cato - Nah, someone who stockier than him, I think.
Clove - Ooh, yes. I like it.
Glimmer - Yes!
Foxface - Interesting, I wouldn't have picked her, but I can see it working.
Lol, sorry if I seem a bit dramatic about some of them, but the chances of the people you picked fitting my imagination is extremely unlikely, lol.
I LOVE THE HUNGER GAMES TRILOGY TOO, lol.