[Matrixbeast]

I do genuinely want to get into some Showa stuff, but it's just so...Not my style that it's hard for me

I've cherry picked a few episodes of Kamen Rider (71) to watch, and they were...Alright. Honestly, I can kinda see why Nigou saved the show, since it's pretty uneventful. The contemplative brooding is unique, but I've seen it done better.
Amazon is a trip, but when I started it, it was with very poorly translated subs eons ago. I might finish it now that it has competent subs available.

Other than those 2, I haven't touched any Showa series.
I've heard great things about Black and RX. I might give both of them a go, as well.

And not technically Showa, but Shin, ZO, and J were all okay in my eyes. I'd probably rank Shin in middle C. It's uniqueness is a nice change of pace, but I feel it tries so hard to not be a Kamen Rider series it loses it's heart. ZO and J would both probably be in B. They're both alright, but honestly nothing too special or interesting.

The First would be placed in C. I fell asleep during my first viewing of it. Second watching I found it to be...Tolerable. Never watched The Next. Still need to also get around and watch Amazonz.