Just watched Sharivan and Shaider today as well.
To me Shaider was the best of the three. I just have a few things to say.
Hiroaki Iwanaga: It's cool seeing this guy in more toku/media. I never got to fully see his potential as a Kamen Rider because OOO's was not my cup of..anything. As a space sheriff he is awesome, and a slightly fresh take on the goofball, heart of gold character. Plus it always cool to see a fit Japanese hero. Even though I'm not gay I do notice a lot of them on TV tend to be frail, if not frail then they have no form, if no form then they're on the large side. Now at least he works out, and has a right to show off the physique. Yea, there are people who love the look of the frail, I personally find it either funny in some cases or sad. Give this guy a 6th senshi role in a Sentai. I know, he knows, he wants to.
Mayu Kawamoto: 1.) She was super annoying at first, but she got better in the second half. Especially when she turned evil, she damn near flipped the switch for me. Whenever she was serious I was drooling.
2.) They gave her the best choreography out of the whole movie. I can go as far as to say as both Sharivan and Shaider films.
3.) You can tell she has fighting experience outside of film which is sick, and I personally don't see often.
4.) Why do I feel like she is Ami (Kyoryuger) done right? Minus the annoying gf routine. Because they tried to BS some BA tomboy nature with Ami in the begining of Kyoryuger, but I didn't buy for more than a character episode; and character trait in which they dropped anyways! -_-. This girl however had to have auditioned for Sentai before, does anyone know? I'm calling it, she's going to be one of the 40th anniversary sentai senshis.
Kasumi Yamaya: Our solidified future Sentai senshi. It was nice to see a glimpse of her skizzillz. Her smile is killer, i'll enjoy it now since it seems like she'll be a headstrong Pink senshi. Looking forward to it.
Fan Service: Geeez, I have never seen so much in a family oriented toku ever. lol I mean Tammy's got some nice assets, but they showed so much how is the production staff standing there not creeped out by the director? Unless they are comprised of creeps.