I'll happily watch another 2 series of the Dwarf.
Yes, series 7 was dreadful, but I've said it before, and I'll say it again. 8 wasn't that bad. It was mainly in a confined environment and had the bunk scenes back between Rimmer and Lister, which was a huge step back to the best bits of the earlier series.
Back to Earth... was an experiment that really didn't work. No studio audience, single camera setups, fully digital using the Red camera system, it was closer to a cinematic feel then a tv series. But it did lead to Series 10, so not all bad then.
Series 10 was pretty funny. Really should watch it again. Got the bluray somewhere...