I picked Decade. After watching it, I got that weird feeling I get when I see a poorly swen together teddy bear.
Nothing looks right together, and it's all just put together so its together.
I was tempted to pick Kiva, because the plot gave me the impression of a drunken tape-worm, but I liked the designs.
I still haven watched Many Kamen Rider series, so don't be suprised if my choices seemed a little predictable.