I was quite iffy throughout TPM, but felt the good (pod race, familiar milieu, potential possibility in the follow-ups) outweighed the bad (midichlorians, midichlorians... FUCKING midichlorians!). I even gave AotC a pass when I saw it in the theaters twice, simply ignoring the tepid love story in favor of all the gosh-bang awesome action set pieces at the end.
And then something funny happened. I watched AotC on a simple little 28" TV when it came out on DVD, and came to the horrible realization that the movie... actually, really sucks, throwing in all these wild gimmicks in favor of decent storytelling and believable characters. It had become nothing more than a bukkake of SFX, with my poor eyes and ears the recipient. Watched RotS out of 'obligation' ("well, I've seen all of them up to now, may as well see this to the end. Maybe it'll even be go- ah, dang it...") and haven't returned to the SW universe ever since. The PT pretty much ruined my interest in it.
The OT never had that effect when I watched it as a kid on 13" TVs from a double-recorded VHS.