This forum was looking a little tumbleweed-ish for such a science-oriented website, so I figured I'd do my part.
Currently loving playing Charlotte, while she doesn't have great range, she's got a couple of zero-setup attacks and some great, versatile answers to just about anything you'd care to throw at her. Only problem is her projectile startup means she loses BAD in duels.
Had some fun with Darli Dagger, but she seems a little more advanced than what I'm looking for currently.
As for the strats part: I love this game and really hope the online doesn't die before it can get going. It's like Divekick writ large: footsie and mind games over rote combo memorization (and for the record: I love MK and DBFZ, but sooooooooooo many games seem to be going the Big Combo route, so this just feels like a breath of fresh air). I haven't done much online, but baiting people after one hit is working so far.