It gets really, really bad and stupid.
I think season 1 is the best, obviously. Season 2 gets a little unfocused and silly. Season 3 feels like overall it might be better than 2, but the writer's strike back then rushed everything. Season 4 is absolute shit though and completely goes off the rails. It legitimately makes me upset.
Season 5 is a reboot-continuation and it was... pretty alright. Nothing particularly special, but I enjoyed it mostly.
I stream sometimes. Check it out!
www.twitch.tv/heroicbiz/