I gotta go with Blade kind form. It's so shiny!
http://obdpictures1.wikispaces.com/f...BladeKing3.jpg

My favorite is Gaim Orange Arms, closely followed by Kiva's regular suit. They both look stunning and have those neat little details in them that make them look both elegant and bad-ass.
I also like OOO Tajador and Putoryra Combos a lot, basically because of the color-theme and because they can both fly- I love flying riders xD

Wizard infinty

I am very partial to Gaim and his Kachidoki form, but I must say I am most fond of Marika too:

http://i.imgur.com/DA7eT1G.jpg

I'd like to put my vote in for Zenith Arms Gaim. Dai-Dai-Dai Dai-Shogun. I admit, I hated it at first. It looked like Kamen Rider Gaim Infinity Cosmic States, but seeing it in action now has made me fall in love with it.

^This man has excellent taste

Decade: It's got a good mix of classic Rider elements ( the compound eyes, the ovalish belt with a circle in the middle) and it's own unique parts (the head cards, the asymmetrical 'X') that make it a clean and simple but still dictinct look.

Zangetsu: the light green, white and black/gold trim mix wonderfully. And I cant say no to one of the rare sword and board Riders.

Wizard: All the forms but All Dragon (and it's Infinity variants). The clean gemstone looks and the way the colour goes from contained on base froms to all over the suits in Dragon forms just works for me.

I think that suit is absolutely awful :lol

It looks like they abandoned it half way and any detail left is messy and out of place.

Finally, people like that suit!

Marika is actually a big fan favorite over here believe it or not... though to be honest, I'm not sure if it's the actress, the character, the suit or a combination of the three. :lol