Thanks for the help, everyone.
One question that I forgot to ask... Is there any particular reason that Agito looks like a form of Kuuga?
Decade was a bad place to start.
Those who say that Decade is a bad place to start, mostly saw the original ones first and can't accept any other versions of them.
I didn't start with Decade, it was just the first series I finished. Admittedly, I'm saying this without having seen the prior series, but I think watching Decade before the others is the way to go. As far as worlds and characters being different, part of me wants to say "get over it." However, I was raised on Power Rangers. If Gokaiger is adapted and some random guy shows up and tries to pass himself off as, say, Tommy's green MMPR ranger, I wouldn't be too thrilled.
Having only seen most Riders and their worlds for two episodes, I won't be terribly bothered if they're different when I watch the series they represent. In theory, Decade would work the other way around, as a series for Kamen Rider fanboys. In practice, it's done as I'd hope and given me a taste and desire to watch the other series.
Throw out everything you know about Decade before starting with anything else.
...Why?
Watch Kamen Rider Double for a feel at least because it is a Heisei series with no features in Decade beside the movie appearances.
I'm not sure if you're unaware that I've seen W, despite saying that I'd seen 22 episodes in my first sentence (24, now) OR if you're just telling me
how to watch it. Thank you for your recommendations, but your advice was a bit heavy-handed.
And, of course, although alt.Kuuga was generally well received in his own arc, later episodes, often ignoring that he was a Rider or even part of his character (Nega and Diend worlds) just annoyed people and left many with a negative opinion about him.
I actually liked Yuusuke, but I hated that he went about half the series without a henshin. I watched four episodes of Decade and I wasn't too thrilled with it, so I went for some time without watching any. I really came to enjoy to it upon my return, but eventually, I went back to find out if I had just forgotten that Yuusuke lost his powers. Nope. He just didn't use them.
So...is there no official word on this or what?
Takes place between Amazon and Rider War World.
Most books place it either after Amazon World (the Terebikun Deluxe book) or outside the TV timeline completely (the Official Data Files) but just watching the movie and the TV episodes it takes place between, you can see a lot of things don't add up.
I'd always felt it fit best after RX world, considering that the backdrop that falls at the end of episode 27 shows Amazon in the jungle, and the first shot of All Riders is Decade and Amazon fighting in the jungle. I had just figured that was an intentional transition.
But when All Riders jumps back to three days earlier, the chronological beginning, there's a different background...the background of what is Tsukasa's world. Both the Black/RX and Amazon arcs end with new backgrounds falling, neither of which are Tsukasa's world.
there are a few hints in the show itself (like Tsukasa suddenly stopping complaining about not having a world in the two last episodes
But in Movie Wars, Tsukasa says the journey through the worlds is his world.