YES I have, i'm an enormous Rider enthusiast but my area of interest is a little.. specific - I tend to fixate on the weird interim standalone specials era "Between" (Not literally iirc) Showa and Heisei, ie. Kamen Rider ZO, J and Shin, although there's a great deal I love in the larger series. Anything that Shinohara, Takeya, Amemiya or Nirasawa touched becomes an obsession for me - the "Roidmude" artbook for Drive and the S.I.C Hero Saga volumes (I brought back a stack of 5 from Japan...) are like foundational texts for me, I consult them constantly.
If I had to pick A FAVOURITE RIDER....... that's really tough!! I love Kamen Rider ZO because of Amemiya's work on it but like, Doras has more character than ZO himself by virtue of it being a very straightforward pilot. Where do I draw the line between favourite designs, favourite series and individual Riders/Rider adjacents versus Main Riders for specific series??
I think a serious answer is a selection, with the caveat that I think ALL Riders have something to offer, and some of these are purely for their designs while others are more wholly beloved: Another Agito, Shadow Moon, Black RX, Mashin Chaser, Heart, Shin, ZO, Gay, Kamen Rider Number Zero, ALL the other "Another" Riders, Amazon, Kuuga, Faiz
Ah fuck it just goes on. I love Kamen Rider!!!!!
I haven't watched anywhere near enough Sentai, but I guess Zyuranger by virtue of having Power Rangers rewire my brain as a child so utterly
