I'm in agreement with most folks here. "Like it, don't Love it". This may be blasphemy, but I kinda feel the same way about Firefly.
Let's face it, Buffy and Angel were pretty much "perfect" series. In their entire runs, they maybe had 3-4 sub-par episodes each. The rest were above-average to "so fucking great I need to wear a condom when I watch them". Hell, I still maintain that Season 3 of Buffy is THE best single season of any tv show I've ever watched.
The thing is, it's tough to pull off a series with storylines so complex, that require a viewer to tune in every week to keep up. Nowadays, with viewership shrinking, creators are mandated to have self-contained episodes, that anyone can jump on and watch occasionaly. Lost and 24 are about the only major-network shows that require you to watch every week, or be totally confused and give up.
What the network execs DON'T get is that there are audiences out there that will be EXTREMELY loyal to a show that doesn't insult their intelligence or disregard continuity. Heroes didn't start tanking in the ratings because it was too complex or hard to follow; it's tanking because the core audience became turned off at the constant "re-booting" where entire plotlines were just dropped because they're "too complex".
Aside from Lost and 24 (which are the two best shows on tv right now, IMHO), the best shows are on smaller networks. The Shield and Nip Tuck on FX. Leverage on TNT. BSG on Sci-Fi. You get the idea.
Dollhouse seems like a cool concept that's been watered down to appeal to the lowest common denominator. Sad, but I think Whedon's best work will be for a smaller network, or maybe some online show. I'll keep watching, though. I owe him that much.