Well, since I happen to watch Hetalia sometimes (more like thinks about it non-stop), I'm subjected to quite a few accents. The main ones I think are sexy are British, Russian (popular, huh?) and French. And, of course, you can't forget the ones I love to try out. Namely Japanese and Italian. And sometimes French, too. :3
EDIT: Well, I realized I left a few things out. Australian accents are kinda cool as well, which is great, since I have five Australian cousins and two Australian aunts. Yay! Also, not to be confused, Austrian accents are simply amazing. I'm from Minnesota, but I don't think I have that whole "You betcha" thing goin' on here. I'm a pretty typical American as far as how I sound.
Also, @LanceTheTurtle, your sig... :3 I love it.