I started watching at the end of season 7 and have been watching regularly since last season. I'm thinking about going back and checking out some older episodes.
Season 6 is pretty good but I find it weird to watch older seasons where they don't have proximity chat. There's far less organic interaction between the Hermits, which is one of the things I love most about the newer seasons.
Season 8 was my favorite; the collaboration of the Boatem crew on the first Gigabase, the rival shopping districts, and the experimental roleplaying they did just makes the season stand out in ways that others couldn't.