Ah nostalgia. Always fun to see. I was a Power Rangers fan when I was a child. Then Dino Thunder and SPD hit a few years back when I was an adult. Those...were really the only ones I watched. After those I was watching the source material from Japan and beyond, and I had no interest in what Disney was doing to casually slice up my shows of choice. Later Saban, of course. It's the precise reason why I refuse to watch PR: Samurai. It's counterpart was so rooted in Japanese mythology, folklore, and culture, that I knew it'd turn out like shit.
Interesting tidbit for people who care: Recently Saban, after re-acquiring the Power Rangers franchise from Disney, has copyrighted a new name/phrase. "Power Rider". Guess they're gonna be taking another shot at catching lightning in a bottle like they did back in the old days. Sadly myself and some other fans know what this phrase likely means....and it makes us want to either rage or weep.
EDIT: I could be a gigantic geek and explain/identify what every counterpart to every PR series mentioned here is, but...I think I'll just leave this to blow some minds:
http://www.youtube.com/watch?v=3qfDYW1r51I&feature=related
You'll notice Zyuranger (MMPR) comes in after a fair amount of others. Each of those groups had one year's run for their series. MMPR was the beginning for us, but it was just another series for people across the pacific pond.
It's a personal thing for me. It started with watching Mighty Morphin' with my older brother. 
