No god. Please not W.

Why not?

That was just for me personally. I liked W just fine, but don't think it's the end-all be-all of KR shows that others do.

Anybody but Fourze, that's for sure.

Oddly enough, I feel it might be Agito...

It's Den-O.

I think Toei might have attempted to make Kuuga the figurehead by having him as a recurring character, even though he wasn't Godai Yusuke and he was shoved aside for Decade. Now, it's probably Den-O, or hell, even New Den-O.

I'd actually argue that there are two distinct eras now. The first starting with Kuuga, and the second starting with either Decade or W. Starting from W the show has become markedly different in tone.

I'd still pick Kuuga or Decade as my Heisei Rider mascot, though.

The face of Heisei?
Wasn't it always Kuuga?
All I ever hear is Kuuga this, Kuuga that from anyone who loves Heisei.
I personally, don't feel that way about Kuuga as everyone else.
With that said, I would say Kuuga, because no one else (not even Decade) comes to mind.

I'd agree with the Kuuga (For being first) or Decade (Anniversary series) if Den-O didn't happen.