I like Nitou well enough as a character, but functionally he has one of the worst win/lose ratios of any Rider ever.

I'm actually going to go with Hayato Ichimonji, Kamen Rider 2 here, simply because he's much less interesting than Takeshi Hongo. Now, I'm aware that Fujiosha hurt his leg and was unable to film, so they needed a new lead character. Ichimonji isn't bad, but since he completely replaced Hongo for a good portion of the series, I couldn't help but be disappointed and eventually fell off the series because of it.

Specter for me. His character feels like nothing to me.

Mage. They had no reason for being created other than oh look more fucking riders. Now beast was okay but they could've made him less annoying.

I'm not going to say I totally agree here, but it really was a major shift. Hongo was just way more intense.

I'll put Specter & Necrom on the poll after Ghost is over.

Honestly, why wait? There's only a handful of episodes left, and we've had these characters since over 30 episodes ago. People have enough to decide their opinions

They are literally integral to Fueki's plan and the show's ending.

I like Specter and Necrom. But I don't like the other Necroms (minus Alia), Dark Ghost & Zero Specter.

Dark Ghost could've instead possessed the power of 15 villain eyecons.

Too much for the budget if he's only going to appear in 1 movie
But other than that, the Mages don't do anything important. Otherwise Beast was incredibly important because he stopped said Sabbath