None really. I didn't like Kiva, Drive and Ghost, but I don't regret watching them. At least Wizard had cool ideas and the show had a good start but got worst then got decent again in the last act.

I regret watching Decade because it was the first time I got so angry at something I actually had to rewatch it just to make sure it wasn't a fever dream.

I don't regret watching any Sentai. There are some I don't like, such as Kyoryuger, but I don't regret finishing it.

I don't regret watching any Rider series, even Kiva, Ghost, and the last third of Hibiki. I don't think they're all worth revisiting at some point, but I think they were all worth experiencing, the highs as well as the lows.

I'm nowhere near as big of a Sentai fan, but I don't really have any regrets there, either. I think that's mostly because, unlike Rider, I have no compunctions about dropping a show without finishing it. I've started and abandoned as many Sentai series as I've actually finished. If I'd actually stuck through all of Goseiger, Magiranger, or Kyoryuger, then maybe I'd have some regrets - but I didn't.

Does anyone else feel like Necrom should have been the big bad of Ghost and stay evil? Necrom was an incredible threat, could still get his character development as he had no beef with "Onii-chan the character" and would have been a perfect explanation to why Takeru can't use the Eyecons to make a wish whenever he wants

This is about where I stand. I don't regret watching anything all the way through because if a Sentai can keep me interested until the end, then it's worth watching. If I didn't enjoy something, I wouldn't watch it. If I did enjoy something, then why would I regret it?

While it could have been interesting, so far my favorite part of Ghost was watching Alain become one of the protagonists.

Nah, then I would have missed out on the feels that was the Old Lady dying. Granted, Alain's current 'Captain Planet' attitude bugs me, or rather I hate it when all three of them get into a state-our-mission speech mode, but Alain's slow turn to being a decent guy felt good to me, since even after being made most wanted by his brother he still spent a couple of episodes dislike Takeru and not immediately siding with him.

Yeah, I don't think I like his whole "I will protect the Earth's treasures!" attitude. It would have made for a much more interesting character if he sided with them to defeat the Ganma. Then perhaps Alain could have been the big bad and end with a fight?

That would be a bit too similar to Drive though. Hey, let's team up with Heart/Alain to defeat Banno/Ganma! Then at the end we'll duel because Heart/Alain still believes they're superior while Takeru/Shinnosuke doesn't want to fight anymore! We already have enough re-used tropes in this series lol

What would happens if Toei got a method actor to play Kamen Rider or Super Sentai's Villain?

You don't see Method Actors get involved with Kamen Rider and Super Sentai but what if they actually got involved?

Method Actors are the one who stay in character?

So just say this Method Actor REFUSED to be in a voice over role as a villain and insisted to be a non-suit villain so he can bring a great performance from Super Sentai gangs.

He would ad-lined the dialogue in order to get a real reaction from the actors and willing to do stunt! I think he would scare the crap out of Kamen Riders and Super Sentai gang

Method acting means you use your own experiences when playing as the character. That doesn't sound plausible in the slightest for KR tbh

How they should have made Kamen Rider Drive?

I think Many peoples have a problem with Drive because Drive try to be W and it's fail miserably. But I do it better!

1. Remove Cop Elements and made Kamen Rider Drive a Speed Racer show with motorbike!

2. Have Heart, Brain, Medic, Freeze, Mitsuharu Kineta and Tenjuro Banno be the corrupt businesspeople like Vince McMahon that try to screw Shinnosuke from winning the race like what Vince McMahon try to screw Stone Cold Steve Austin from winning the WWE Championship!

3. Remove 2 Part Elements because it's Speed Racer meet Kamen Rider show

4. I would made Chase a long-lost brother to Shinnosuke like Racer X-type guy

5. Remove Jun Honganji as he was the one whom people have problems with