I just watched the season over the last week and I really loved it. I'm kinda wary of a second season though. Obviously there's room for more plot in the grand scheme of things, but what about characterwise? The characters story's were the best part of the show, but
Despite about half the cast being shot or exploding(And you know they'll all be fine, except maybe Nathan) it seems like their stories were pretty much told for the most part. Hiro found some strength, Nathan put what was right first, DL and Niki saved Micah(And Niki's personality stabalized. Or if Jessica actually IS Jessica she stepped down for her sister), Bennet and Clair reunite. Granted not much going on with Parkman(Once he's out of the hospital) and Mohinder, but while I liked them both Parkman just seemed along for the ride and Mohinder's role really felt dimenished after his big confrontation with Sylar.
So what do you do with the characters when they've all found themselves and reunited with their families? I hope they had a bigger plan for the characters from the start, because if they just plan on making another season from scratch I don't think it'll be able to live up to the first.
What about people like the Haitian(which really irks me. I really want to know why they call him the Haitian when he does absolutely nothing to give away this fact, especially when for most of the show he doesn't even speak. Then you have the older generation. Clearly they have their gifts and schemes, but we find very little out about that. I think there is alot that the second season will have to offer.