For me, "classic" Dwarf is series 1 & 2. Like early childhood, everyone was finding their legs and developing their own personality. Series 3-6 are pre and early teen years, involving the pushing of boundaries and the development of new ideas and just generally coming into their own as a mature show. And then there's series 7 & 8 which I'm still somewhat torn about. I'm not entirely sure if all of their parents' loving and nurturing turned out for naught as the show turned into somewhat of a jerk in its late teen years. Or maybe the show just started taking classes that its parents and guardians didn't approve of, basically going off to art college instead of getting a "proper degree".