Hmm. I think you can spin that one either way,
chowzinha.
Why don't we take a look at each one?
Carlisle: While I think he wouldn't mind being human, I know he enjoys the healing work he does and how his vampire state allows him to save those who could have been lost. He admits as much in
New Moon. He probably wouldn't mind staying a vampire- he can save so many lives that way.
Edward: I believe the only reason he would want to be human, would be to be human with Bella- to be normal, so he can really live with her. That's been kind of rendered moot due to her transformation. Aside from that, he believes that he is damned... He probably wouldn't mind being human again.
Esme: As much as I think Esme enjoys her new family, I think she also wishes to be human, to be a real mother- she remembers the child she lost too strongly to ever get over her maternal instinct. Sure, her first husband was quite the monster, but she managed to escape him... I doubt he'd be a factor if she were able to revert to human.
Rosalie: Clearly, she wishes to be human- to have babies, to grow old with her husband. We even know that she'd be willing to give up Emmett if it meant being human again. I believe she's the only one with a clear-cut answer, here.
Emmett: Nothing bothers Emmett- not even being told he's no longer human. He enjoys whatever he does. He would probably not mind being human again, especially if it meant being with Rosalie- though he'd likely miss wrestling with those irritable grizzlies.
Alice: She remembers nothing of being human and tries to live vicariously through Bella- yes, I think she wouldn't mind being human either. If only to experience things as a human does- things that she may have already experienced, but forgotten (or never experienced at all)... Of course, her transformation led to Jasper...
Jasper: He's one I'm not so sure about. Clearly, had he not been turned, he wouldn't have had to go through all those years of bloodshed. However, he was also a soldier, so it seemed that bloodshed was in his future, one way or the other. The only light in his existence as a vampire is Alice- he would do anything for her. If she wanted to be human, he would follow her in a heartbeat.
Bella: She seemed destined to be a vampire, no? If Edward was able to become human for her, I think she would have been happy staying human. But she wanted to be his equal, to not hurt him with the lure of her blood... She was quite content to leave it all, to be with him. So long as Edward was a vampire, she would insist on becoming one.