Okay, I think I just have to say it: I'm not a big fan of the TV series Dollhouse. Joss Wheadon is usually great, as Dr. Horrible and Firefly can attest (and I think I could even watch and enjoy Buffy).
But not Dollhouse. I think a large part of it is the lack of characters that I'm able to care about. As the concept of 'Dollhouse' is unambiguously disgusting and evil, I have a hard time caring about any of its employees as characters - Topher and Dewitt especially. The 'actives' have ceased being people, so it's hard to really care about them. Maybe if Caroline, Echo's original self, were more compelling then I would at least be able to root for her being reinstated.
Ballard, the FBI agent, isn't very sympathetic either, and is rather obsessive; not necessarily because he sees the dollhouse as evil, but just because he seems the obsessive-type person, who is out for his ego as much as justice. I liked Mellie, but she was then revealed to be an active, as did Dr. Saunders.
Which, I guess leaves Boyd, Echo's handler. I guess what I don't find believable is his willingness to work for the Dollhouse while retaining his moral reservations about the place. He doesn't seem like the type of person who would otherwise be starving on the street, so his willing to do something he sees as immoral doesn't speak well to him.
On top of the lack of characters to care about, I don't really feel the need to know what happens. The show is unfolding rather nicely, and might have made a nice movie, but it's not the type of thing that I will devote much time thinking about the mystery of what happens, like I would have in LOST before I gave up on that.
I'll finish out the first season, but I probably won't watch any more beyond that.