I checked out on Power Rangers during the Turbo era. I was in the 5th going into 6th grade then and morphing cars just didn't appeal to me like mythical monsters did. Plus everyone from the Mighty Morphin era had or was about to check out. However, when Power Rangers had a resurgence a decade ago I went back and watched and I really liked In Space. The final two episodes of Turbo were also gutting as well. There's something about seeing the Power Rangers lose. I didn't really check anything out past Lost Galaxy although I did watch a lot of Linkara's reviews about later seasons. One season apparently had a guinea pig as the Zordon character of that season which is

.
Anyway, In Space gets my vote.