I said Gaim was my first series. But if you want to count the American/English version, Masked Rider/ Kamen Rider Black RX would have been my first.

Kabuto was the first show I watched.

Technically, Wizard. First show I watched start to finish, Fourze. First show I watched as it was airing, Gaim.

My introduction to rider heroes was the KR Shin movie I watched at an animes/mangas con when it was released in VHS. My first rider series was Kuuga, I watched the whole thing raw as it aired in japan, downloading eps. a few hours after they aired from a now definct japanese P2P program. Yep, i'm old like that...!

The first Rider series I watched was W actually within the past year. I'd been toying with the idea of delving into it while I was watching Go-Busters, because I was having a tough time getting into that and needed something different. Someone recommended W, so I went for it and was hooked immediately. Love that cast and the aesthetic of that series so much.

From there, I continued to OOO, and I just finished watching Fourze the other day. Had an unexpected mini-marathon of the first six episodes of Drive last weekend, but I'm likely going to take a break before jumping backwards to check out Kuuga.

Yeah, W was my first series as well.

Technically Black RX when I was a kid seeing it on TV
Started to follow Kamen Rider again with Gaim. :3

My first was the original series. I wanted to see Kamen Rider in its purest form, so I could get a better understanding of the tropes that make each season unique. I think I only made it up to episode 17 before I fell off of it, but I did enjoy what I saw of it.

W was technically my second unless Dragon Knight doesn't count

OOO.