@ yerserper this is hard so i'll give you my top 5
1. Kamen Rider Evol
I like Evol character in the story and is the best villain in the Kamen Rider series, his design is very cool especially the black Hole form, and Evol theme (Evolution)is one of my favourite Kamen Rider theme of all time.
2. Kamen Rider OOO
The first Kamen Rider i watched when i was around 7 or 8 years old, i still remember all of the combos and their theme song, my favourite song in this series is either Anything Goes and Power to Tearer.
3. Kamen Rider Zero One
Ngl when Zero One first came out i don't like it but now it's one of my favourite, i like the design and Aruto's personality, my favourite theme is is Now Is The Right Time, Find A New Life, and Zero One theme.
4. Kamen Rider Ark
I like his design that looked like a broken robot or a unfinished robot with exposed part and cable all round his body, which make it cooler since all of the other rider in the series looked so clean and slick, and he kinda reminds me of Ultron.
5. Kamen Rider Genm
I like Dan Kuroto and his chaotic personality, and his theme Wish In The Dark is pretty neat.