Mine are
Ouja, Odin, Faiz, Kaixa, Delta, chalice, Leangle, Thebee, G Den-O
New Den-O, Kiva, Saga, Dark Kiva, Decade, Accel, Birth, Wizard,
White Wizard, Zangetsu, Ryugen, Shin Zangetsu, Kamuro, Jam, Drive

1. Joker
2. Zangetsu
3. Accel
4. Zeronos
5. W
6. Skull
7. Gaim
8. Dragon Knight
9. Den O
10. Decade

Oh boy... (In no order)

Asakura Takeshi (Ouja)
Shuichi Kitaoka (Zolda)
Shinji Kido (Ryuki)
Hajime Aikawa (Chalice)
Eiji Hino (OOO)
Tendou Souji (Kabuto)
Hidari Shotaro (W/Joker)
Akira Date (Birth)
Kouta Kazuraba (Gaim)
Mitsuzane Kureshina (Ryugen)
Takatora Kureshima (Zangetsu)
Kaito Kumon (Baron)
Oren Pierre Alfonso (Bravo)

Black
Zangetsu/Shin
Decade
Kabuto
Baron
Faiz
Gaim
Joker

(In no particular order):
OOO
Kiva
Decade
Agito
G3-X
Gills
Gatack
Chalice
Blade
Sasword
Kabuto
Kick Hopper
Punch Hopper
Black/Black RX
ZX
Super-1
X
Faiz
Kuuga
Kaixa
Knuckle
Gaim
Ryugen
Bravo
Gridon
Zangetsu
Baron
Duke
Kurokage
Hercus
Ixa-both
Dark Kiva/Saga
Birth-Both
W
Garren
Leangle
ZO
J
Shin
Beast
DiEnd
Rey
Fourze

I think that's it, I love a lot.

In no particular order.
Ryoji Hase
Kouta Kazuraba
Oren Pierre Alfonzo
Zack AKA MISTAH KNUCKLEMAN
Hideyasu Jounouchi
Takatora Kureshima
Ryoma Sengoku
GENTARO KISARAGI
Ryusei Sakuta

and some others I'm too lazy to list.

Kazuma Kenzaki/ Blade
Eiji Hino/ OOO
Kouta Kazuraba/ Gaim
Shotaro Hidari/ W/ Joker
Gentaro Kisaragi/ Fourze

No surprises here.

1. Garren
2. IXA / Dark Kiva (Otoya Kurenai)
3. Kabuto
4. Faiz
5. Zeronos
6. Baron
7. Black
8. OOO
9. Wizard
10. Beast

<Main>
Riderman
Black
ZO
Kuuga
Blade
Kabuto
Den-O
Decade
W
Gaim

<Sub-rider>
Another Agito
Knight
Garren
Leangle
Chalice
Todoroki
Gatack
Kickhopper
Punchhopper
Dark Kiva
Meteor
Baron
Ryugen
Zangetsu
Bravo
Gridon
Kurokage

<Movie only>
Orga
New Den-O
Eternal
Skull
Nadeshiko
Kamuro

They are sooo many that I like and my favorites pretty much change every day so I try my best to narrow them down.

01. Shotaro Hidari & Philip/Kamen Rider Double
02. Takeshi Hongo/Kamen Rider Ichigo
03. Godai Yusuke/Kamen Rider Kuuga
04. Shiro Kazami/Kamen Rider V3
05. Ryu Terui/Kamen Rider Accel
06. Kazuma Kenzaki/Kamen Rider Blade
07. Sokichi Narumi/Kamen Rider Skull
08. Eiji Hino/Kamen Rider OOO
09. Kouta Kazuraba/Kamen Rider Gaim
10. Gentaro Kisaragi/Kamen Rider Fourze