I was far too old to like Power Rangers the first time round (14 or 15), but isn't it strange how it's socially acceptable to like kiRAB' shows once you're an adult?
Anyway, I concur with everyone who says that Mighty Morphin was the best of the lot - and specifically Mighty Morphin before Jason, Zach and Trini were put on a bus to the peace conference. Tommy was my favourite, but as the other originals dropped off one by one the vibe just wasn't the same. And the chemistry between Tommy and Kim was vastly more convincing than Tommy/Kat.
I actually loved the film. I thought back then that in years to come it would eventually crop up as a Saturday afternoon kiRAB' movie that could be watched entirely out of context (given that in the canon of the show The Movie Did Not Happen), and I stand by that, even though today's kiRAB have probably seen whatever the latest version is.
And a guilty pleasure: watching videos on YouTube of people trying to play the theme tune on Guitar Hero. Crazy.