I watched as a kid together with my sister. I remember that our interest peaked at S but started to wane almost immediately at super S, missing a lot of episodes, even worse at stars.
My fav was Makoto/Jupiter, I still remember her introductory episode during the "Seven Great Youma Arc", a part of the story that I always regretted they didn't expand on more. As a kid I even tried to make an comic about it.
I agree with what other already said: the anime may be aimed at girls but they really amped some aspects for the boys. Plus, it may sound weird, by i liked the inconsistencies in animation, with different animator and designers working on different episodes. Sure, the animation and style varied a lot but it led to episodes that had people whose style was tailored for the theme and often helped draw out the best out of the story. There were lots of fantastically animated parts to counterbalance the very cheap ones and the stock footage was often amazing.
I loved the soundtrack, especially the OST of the first series: those electric guitars were amazing and they used them a lot, especially in some instrumental version of the main theme.
"Moon Prism Power Make Up" and "Moon Tara Action" are easily my favorite: they have that mix of romantic yet adventurous sounds that really fit the themes.
I tried to watch the remake but stopped very early and I just checked it occasionally to see how the situation evolved. They tried to adapt the style of the manga but, in my opinion, they didn't succeed and they kept doing mistakes trying to adjust it. Having read the manga I know the anime diverge a lot from it and the character are very different in terms of behaviour but it was good to have two different interpretation of the story. Interestingly enough the manga had a lot of more creepy and horror-like elements (as it was showed in some previous posts) and the author really was fixated on cyborgs. If I remember correctly, the initial idea for Ami was for her to be a cyborg (maybe all the references from Robocop are a remainder to the initial concepts?), an idea that was then used for Hotaru.