Season 2 has most of the best John/Aeryn stuff, IMO. Season 3 has most of the best epic Scorpy/John stuff. Season 4 has Grandma.
Worse addition to a show ever.
The last time I went through the series and got to Season 4, I didn't mind it too much, even with Noranti there. I agree she was the worst addition to the show, but that doesn't make her that
bad. In the interest of not spoiling, I think the reason I liked Season 4 this time around was because there wasn't a long break in between Unrealized Reality and Kansas. Seemed like once the season got to those two episodes, things started to really flow and it ended up being relatively decent.