[Aoi Kurenai]

Agito has a pretty fantastic ending. You get an unusual final confrontation and decision made by the enemy after which you're treated to a look into what the characters are doing with their lives.

Also thoroughly enjoyed Blade's ending, it's one of the very few I feel lives up to the original idea of Kamen Rider as the "lonely" figure who can never actually be with people. That final scene in the park with the bench is pretty great, I don't think it'll ever lose its impact on me.

Also loved Gaim's ending. Sometimes you have to sit back and remember Kouta being a normal guy at the start of the show with normal issues. Even as he gets his powers, he has no idea how irrevocably altered his life's going to be in around a year.

Stronger and Black also have fine endings. Stronger was, at the time, the end of Kamen Rider, so to see every Rider coming together was great. It had a real sense of finality. Black's ending I loved because, like Blade, it shows you just how far a hero has to go despite the fact he's going to end up alone.