I use Kaiser in Roseville and LOVE all the Dr.'s!!! As for peds, our main Dr. is Dr. Ken Hempstead, but we've seen others through their clinic when my kids are sick on the weekends. Dr. Hepmstead's wife is great too! Can't really go wrong as far as I can tell. My OB is Dr. Khurana and he is friendly, energetic and thorough. The only thing I experienced there was that his appts tended to run late, sometimes up to an hour. I know that can happen in OB (what with babies being delivered at all hours), but this was before the labor and delivery was in Roseville.
Sorry I don't have any derm recommendations and as far as adult primary's, I have one, but don't go to the Dr. very often myself, so I have very little contact with him.
Hope this helps!