Best Season Ever:

1. Power Rangers Time Force
2. Power Rangers Wild Force
3. Power Rangers Lost Galaxy
4. Power Rangers In Space
5. Power Rangers Lightspeed Rescue

Good Season:

6. Power Rangers Zeo
7. Power Rangers Turbo
8. Mighty Morphin Power Rangers Season 3
9. Mighty Morphin Power Rangers Season 1

Okay Season:

10. Mighty Morphin Power Rangers Season 2

I have a lot problem with the first series of Season 2 is because of crappy Zyu2 footage. I aboslutely hated it. Until White Ranger first appeared, the second series, it got a lot better. With all footages and Japanese footage of White Rangers and zord battles.

Worst Season Ever: Disney fails

100. Power Rangers Ninja Storm
101. Power Rangers Dino Thunder
102. Power Rangers S.P.D.
103. Power Rangers Mystic Force
--
200. Power Rangers Operation Overdrive

So far, Jungle Fury is getting good, it seems for me. So I have a hope for the new season this year.