For me personally, right now the only one Im interested in is Kylo. He looks super cool to me. I never buy any Jedi though, just because I think they look dull visually. Boring brown clothes, plain faces, nothing that makes me feel like "I need to look at this everyday". I definitely get that with the villains though. Theyre always far cooler looking than the Jedi so Ill pass on those.
Yeah, every Jedi has the same outfit (which makes old Ben's "hiding-out in Ep 4" clothing choice make no sense) but why does every Sith-related villain have to go to the same clothing store as the Emperor? It would have been nice to have seen a slightly different look for the key villain.
I think that's the one issue I have with the trailer - not a whole lot of truly new visuals; character designs like Jabba or Yoda, visually different planets we haven't seen, some radical visual like the Death Star. I love the crashed Star Destroyer and color-swapped TIE's, but something really new would have been cool.
Based on the trailer, I'd consider Darth Revan, and I kinda like old Poe, seems like a cool character. I'll reserve judgement on Luke, Han and Leia until I see them in action.
Kylo Ren looks like EU Darth Revan but I don't think it's the same guy.