First three seasons were.
Revenge was solid, but d you can tell how getting the season cut in half hurt it.
All-Stars was just disappointing all around. Ruined many characters. Had many shiity moments. Just an unfortunate waste of time.
Pahkitew Island is pretty mediocre although I somewhat enjoyed it overall. I didn't like how it never had a "central villain" either. No, Sugar doesn't count. She's just a Force of Nature instead of a "cold, calculating mastermind" Had some good characters but the bad character are REALLY bad
Ridonculous Race is just below World Tour and Island for me. Very nice and funny with a lot of enjoyable characters.
I really wonder how they're gonna handle Total Drama Reboot. I mean, it has been 14 years since Island debut. Will it go back to the more "adult" themes that Island had or will it continue the flanderization of characters/situations and make situations absolutely cartoony?
It's nice that people are now talking about it on YouTube and it's also funny how you can watch the entirety of the first three seasons on YouTube with no issue.