1. Harry Potter
LMFAO!!!! Lettuce!!! XDDDD

Okay, let's see...

2. Star Wars: Meh... uh... Chewie?
3. House M.D.: Oh come on!!! House! *pokes*
4. Charmed: Phoebe! Before she got all responsible and boring!
5. Venture Bros.: Whut?
6. Firefly/Serenity: Totally Jayne and Wash! Am I right? XD
7. Disney Movies (2 characters): Um... Jago and... er... Cusco?
8. Little Britain: ..? O_o
9. Captain Planet: ...???
10. Buffy/Angel: Ooooh! Only one..? *flails* SpikeXander!