[TimeCrimson]

Chouseishin series definitely. I've enough parts from all three to say that they are all awesome, and have awesome stunts and choreography, with a mech dynamic that isn't much repetitive like Sentai. And all have their fair share of drama and comedy, making a blend. I wish it got more recognition, because I adore the heck out of this series, and sometimes it's on par with Sentai in my opinion.

Tomica Hero also is really good, I love Rescue Force but haven't seen Rescue Fire, but that's an awesome one too.