I think I'm done with seasonal play. I finished up Conqueror for my Monk, and only need 3 things to get Guardian, but frankly I don't really have any desire to do it. I wound up getting the stash tab for my son's account in about a week. I plan to keep doing that in future seasons until I get the max of 4 you can get that way.
Really, the only thing that interests me right now is finding the cosmic wings. They are so hard to find though that it is somewhat discouraging, and it gets old fast. I will probably level up gems (non-season) in between goblin hunting runs to keep it fresh.
I'll still try the challenge rifts too. The last few have really been tough.