I loved the first season because I'm a huge fan of Pratchett and Gaiman, so was a little nervous that the next series, with no source material to adapt wouldn't hit the mark. But then I saw that Neil had asked John Finnemore to help him write it, and that sealed it for me. No one could replace Terry, but John Finnemore comes damn close.
Anyway, season 2 is wonderful, with some beautiful little references to Pratchett's Discworld. Also, I'd gladly watch Sheen and Tennant together in anything.
Just finished S2 and really enjoyed it. A bit sad that I wasn’t able to resist and watched it all in just a few days.
Maybe I’ll go back and rewatch the first series