I figured it was time for me to hammer out a list like this sooner or later so I'm going to rank all the riders I've seen so far. At the time of this post I have seen Ryuki, Faiz, W, Decade, Fourze, Wizard, 1/4 of Amazon, half of Den-O, half of Kiva, one episode of Hibiki and have seen 9 or 10 eps into Gaim. For the purposes of this list, I am not counting Gaim for now because I'm not really sure where I stand on it this early. I won't be counting Amazon either since I've only seen 1/4 of it. Hibiki will also not be on this list since I haven't seen past episode one. Kiva and Den-O will get a separate section from the completed series. I will most likely do an updated list once I finished more rider series.
5. Kamen Rider Faiz/Kamen Rider Decade:
most aggravating rider character list" then you already know why I hate the guy so I'm not going to repeat myself. Inoue seems to like Kusaka alot to let him do what he does with little to no repercussions, it also leads to a plot-hole involving him later in the series. Takumi/Faiz isn't necessarily a bad character, he just wasn't a lead character that I could get behind. Of the three, he is the one most I'm neutral on. Kiba was my favorite character in the show due to his drive to hold on to his humanity while others carelessly tossed away their attachments to their human-selves. He even went so far as to urge fledgling Orphenocs not to turn their backs on what they once were. The heroes in general seem to have some major communication problems and don't really seem to trust each other enough to tell them that something is wrong other than when Orphenocs are attacking. To make matters worse, they took Kiba the one character I actually liked and made him do a complete 180 near the end just to increase the already depressing and dreary mood in Faiz. He was a ray of hope in the dreary world of Faiz but Inoue just had to do that to him. Coupled with that and the personalities of its riders, Faiz's ending is also less than satisfactory. It has an alternate ending in its movie "Paradise Lost" though that ending is about on par with the series ending for me.
4. Kamen Rider Wizard:
3. Kamen Rider W:
2. Kamen Rider Fourze:
1. Kamen Rider Ryuki:
Series I've haven't finished yet: It should be noted that since I haven't finished either of these series yet, these are only my thoughts as they stand at the moment. My overall thoughts will likely change once I actually get around to finishing these two series.
Kamen Rider Kiva:
Kamen Rider Den-O: