its always better to be taught by someone who taught themselves-ALWAYS

Hmm, I really dislike Ginny. So I'll go with Harry definitely, since he's my favorite Harry Potter character and I think he's kinda hot. lol.

^Just because you dislike a character doesn't mean he would be better at teaching you.

Anyway, I think Ginny, because, like retrolove83 said, it's always best to learn from someone who taught themselves.

I'm as nearsighted as Harry, so he'd be the best one, as he would understand my difficulties

I'm a girl so I would feel more comfortable with a girl teaching me.

Harry is a lot more experianced in Quidditch, although Ginny is a good player (as well as flexible in positions). I wouldn't have Harry teaching me just because I don't like Ginny.

^Yeah, same. Not that I don't like Ginny, she's pretty cool in the books.

Being able to teach yourself is no proof on your capability to teach others. :) I'd choose Harry because it's shown that he has a talent at teaching others and he's good at flying, so it all works out.

Both

Harry wasn't really taught by Oliver Wood. His father was a great Quidditch player, Harry didn't need to be taught, he was a pure natural. Both were self-taught technically.