If I added in what I've seen of Blade and Black into my list so far then (still worst to best):

Kuuga
Blade
Fourze
Wizard
Black
OOO
Dragon Knight.

Just out of the ones I've seen in completion...

Den-O
Ryuki
Blade
OOO
Kiva
W
Fourze
Kabuto
Decade

I'm a few episodes behind on Wizard, about half way through Kuuga, and I've seen the first episodes of a few others, but I didn't feel it was quite fair to judge any of those since I haven't seen the to completion, if I were to add Wizard, he'd be at the bottom, and Kuuga would probably be around Decade, since at the moment I like them about the same.

Another thing is Blade himself is my favorite Rider, but I thought that Den-O and Ryuki's shows were overall better.