Haha, I've mentioned this before, but my only complaint with RPM was it's theme. It was such a frankenstien. It was post-apocalyptic, borrowed a lot of Terminator imagery, but the Rangers technology didn't reflect that, they were animals AND cars at the same time. Animal Cars. Bird jets, dog and bear trucks, a flying shark, flying remote controlled car attack drones... sillier still was the person who invented them is the most unimaginative person ever, very by the book, and we're expected to believe she designed a giant red dog rover with googly anime eyes and only ever thought about effeciency. It's just one of those things you have to work with when your using Sentai footage though, and to their credit they really toned down on the pointless extra gear, like the aforementioned flying RC car.
One thing I did love was the Morph Suits though, had much more focus on the vehicle side, and if you can forgive the 'seat belts' they had this awesome 'burnout' thing going on, where wrist and ankle wheels could rev up to be like buzzsaws and they could accelerate their spinning motions when they kick like a race car pulling a doughnut.
Another thing I adored was how often they took their helmets off. Such a small thing, but it helps blur the lines between original footage and the Sentai stuff. Plus Dillons suit just looked... I dunno, it matched his more violent character.