IMHO, Dave was a phenomenal character. Problem was, Adam Brody *was* Dave and he went off to do the OC. So Sad. That "Say Goodnight, Gracie" scene was phenomenal--so vintage GGs and extra cool since it was b/w Dave and Mrs. Kim --neither of whom were like the big stars.
And this probably not appropriate for this thread, but Zach = complete wanker compared to Dave. That's the bummer thing about Lane now. Dave was at her level and Zach basically has his head up his you-know-what. (I won't even start to speculate about what's going on now...)
I do like Dave's other replacement though--Sebastian Bach. I wonder if anyone else is old enough to remember him from his former life...