I'd say SPD. I think it was the best cast (on the whole) since MMPR Season 1.

I always thought Dino Thunder was just one big missed oppurtunity.

I say Time Force since it had one of my favorite sixth rangers, one of the cooler battlizers, and some pretty goood acting

RPM leads this poll, followed by Time Force and Dino Thunder.

RPM as Tamashii said earlier for this line:

Tenaya 7: "Red is the leader, yellow is the girl, green is the clown and black is the brooding bad boy. What are you supposed to be?"
Flynn (Blue Ranger): "Ah'm Scottish!" (punches)

I'm voting Time Force because I could never catch RPM and, when I was most interested in watching it, I couldn't find video online that wasn't crap quality.

I'm aware it's up on Netflix, but I haven't had the interest in watching it recently.

This one is easy, DinoThunder. It is the last PR series to be any good and has a great cast with a serious villian. It does have its horrific moments, but out of all of the Disney ones, it is the least insulting (outside of the poorly "dubbed" Aba episode). It is also the only Disney series I could watch every episode to though.

I would say LSR is probably the next on the list because of the villians, followed by TimeForce because of its concepts.

i love dinothunder - i wish diseny write deffenet final for dino thunder
dinozords be live right now

Mystic Force. How is that even a question?

Mystic Force. Mostly due to capes , my crush on Madison & The Megazord. I am also pretty sure Vida had the coolest looking female ranger suit ever.