We all know that only one guy deserves the title of my all time favorite Kamen Rider and that's this precious, selfless dork:
http://i61.tinypic.com/2dbjcb4.png

Kazuma Kenzaki aka Kamen Rider Blade. The husbando. The one and only.

Seriously though, he is still the Rider that impressed me the most. When I first watched Blade, I actually didn't find him that remarkeable in the first episodes. He sure grew on me personality-wise, but that was about it. Until that one fateful episode aka episode 36. Avoiding spoilers here, but what I can say that Kenzaki's strong wish to protect people and the fact that he was ready to even sacrifice himself for saving just a single person really left an impact. Not to mention the heart-breaking decision he made at the end of the show.

Also... About Blade himself: Suit porn level max.

Runner-up is Gou Shijima/ Kamen Rider Mach.
http://i59.tinypic.com/30u9rsy.png

Tbh, I found him pretty annoying at first, but I really loved the direction his character development took. The more aggressive and serious he became, the more I liked him. I guess that's mostly thanks to Inaba Yu's incredible acting skills. What I also love about Gou is that he might be a secondary rider, but he never steps back just so that Drive can be cool. He actually questions Shinnosuke's main character privileges and does a whole lot of stuff that make him (almost?) more interesting than our titular hero himself.

As for Mach: This is the proof that learning to love a character can also mean learning to love a suit. I didn't like the Mach suit at first but these days, I find myself liking it quite a lot. It's not my favorite, but it is pretty cool.

That being said: The series ranking is in the same order. Blade is my favorite, Drive is second. Third is OOO btw.

I would say personally say Godai Yusuke as Kuuga, the guy that everyone looked up to, and Kuuga being an only rider show makes Kuuga itself worth more because there isn't a second rider to save them if Kuuga dies.

My close runner up would have to be Tendou Souji/Kabuto because of his character, arrogant but brilliant, Tendou will always find a way...

Right now Todoroki comes to mind.
His debut battle was awesome.
And that finisher.
https://www.youtube.com/watch?v=FNRP8fGrHcM

Couldn't agree more. I came in here wondering for a few seconds who to say, and I thought of Blade just before I started reading your post. I'm one to struggle with favorites; Do I base it on character? Coolness factor? How well s/he fulfills the point of the character? Does this one thing s/he did measure up overall to something else? But the finale of Blade really solidifies what a great hero he is.
What he did there is kind of ridiculous in how quickly and unhesitantly he did it, but it's just so well written and in-character for him that I find it one of the most emotionally powerful story arcs in Rider (I've seen Decade, everything post-Decade, Kuuga, and Blade).

Plus I like the actual Rider. I like the simplicity without being too simple (i.e. Kuuga and Agito), and he probably has my favorite final form design. And debut.

Can I just point to half my signature combined with my Avatar and a few others I haven't put in my signature.

It very hard for me to say just one lol.

Kamen Rider Knight since he did his own thing and had a noble goal of saving his true love. Very disciplined too, no room for doubts, just pressed forward no matter the obstacle.

Second would be Kamen Rider 2 from The First/Next. Ichimonji had a similar trait of pressing forward no matter the obstacle, enjoying the finer things in life and living it, even though he knew his time was up soon. What a way to go out. That guy was bad ass. What other rider jump kicks the side of a moving truck and places his helmet on the road as a way of saying good bye?

BAD.

ASS.

Kamen Rider Baron the man is perfect he does not back down from no one. He has three cool forms Banana, Mango, and Lemon plus the suit has red in it a color I like. Last he turns into an Overlord Epic way to become a rider and turn into a villain and mop the floor with duke love every moment of it. Baron is one of the coolest riders ever in Kamen Rider Gaim.

Kamen Rider 1 Hongo Takeshi & Kamen Rider Black Minami Kotaro.