At the moment, I don't like any of the characters, except for Claire but she hasn't done anything except being pretty and having a "high school teen story".
Noah Bennet: being dad, getting the Haitian in the pic when someone screws up
Matt Parkman: doesn't want to use his powers, only mopes about it
Hiro: going to die, can't use his powers properly
Ando: finally has powers, doesn't use it and keeps whining on Hiro
Peter: only seems to have one power at the time and they rarely show him using it
Nathan/Sylar: I'll just say: WTF
Angela: living up her high-society lifestyle, keeps moping on end
Nikki/Jessica/Tracy: settling in, boring and lame
Suresh: ah is he still in the show ? Didn't realise it. After previous season he lost any interest
The original cast, which showed so much potential in the first season, has been completely destroyed by bad writing. I hope they will start over with a new cast or seriously get their act together.
Why I'm still watching a show I think is bad ? Because I have hope of it returning to what it was in season 1.