This is for book characters only, because I'm immensely disappointed with a LOT of movie depictions of characters, but that's another story.
1. Favorite character?
I have two. Ron and Ginny, easily. Harry comes next, and then at that point, I don't really care about lists, since I actually /like/ the way all the characters were written.
2. Which character would you want to go on a date with?
I dunno. I've never felt all that romantically inclined to any of the characters, but I love all the ships that happened at the end though!
3. If you were away, what character would take care of your pet for you?
Harry, Ron, Ginny or Hermione. As much as I love Neville, Trevor doesn't do too much for his track record. Seamus might just accidentally set it on fire. These four have a certain affinity for pets (Harry -- Hedwig, Ron -- Pig, Ginny -- Arnold (and she's a cat lover), Hermione - Crookshanks).
4. What character would be your best friend?
Ron and Neville, probably. I relate to them a lot, insecurities wise, humor wise, and all that. We'd get along fine. Maybe Harry, Ginny, Hermione, and Luna too.
5. If you could take a character camping, what one would it be?
I reckon Harry, Ron, and Hermione are pretty sick of camping, so I'll just bring along Neville, Ginny, Luna, Fred (er, assuming this is before DH), George, and Mr. Weasley. Oh gosh, this sounds like an amazing camping party already!
6. If you had the choice to go anywhere with a character, what place would you go, and who would you go with?
Probably'd hang out at the Three Broomsticks or the Leaky Cauldron or the Hog's Head (Madam Puddifoot's is a no-no) with Harry, Ron, Ginny, Hermione, Neville, and Luna. If it was just a few people, I'd probably go with Harry, Ron, and Ginny; or Fred and George, because as much as I love Hermione, Neville, and Luna (which is a lot; they're some of my favorite characters in the series), I don't think they'd be the best company at a pub.
7. If you could be a character, which one would you be?
Ron. Hands down, no contest at all.
8. Which character would you want in your dorm at Hogwarts?
Harry, Ron, Neville, Dean, Seamus, Fred, and George, and I don't think Coed dorms are a thing at Hogwarts.
Oh gosh, looking back, I'm starting to realize how much a fan I am of both Ron and Ginny. Which is a good thing, I think, because out of all the characters in the universe, these two get the most flak.