Kamen Rider Drive
This was one that felt slow (I'm sure there's a joke you can make in there...) and kind of boring at the beginning, with it feeling like the cast and crew needed a bit to get into the swing of things; even the Roidmudes' whole schtick was something that took several episodes to really set in stone. Following Mach's introduction, however, things really took off. Shinnosuke had a lot of great dynamics with the rest of the cast and some relatable flaws, even if that arc about his father really felt like it came out of nowhere (as great as it was) and supplanted his previous arc concerning his guilt. Gou and Chase were my absolute favourites, however, and Kiriko was awesome in how she got to kick some ass; she felt a little too passive in that last arc, however, when it really felt like she should have had more of an active role given what was going on. It was still nice how most of the supporting cast got a turn in the spotlight, and the Roidmudes turning out to have more dimensions to them as the show went on was really lovely. Banno is also now one of my top Rider villains just for how much of a bastard he was.
The Riders' base forms were all some of my favourites to date, so it was disappointing that a lot of their transformations were unable to live up to them (all of Chaser's looks were aces, though). I'm also probably wrong about this, but the number of Shift Cars felt much higher than the number of power-ups in the other Rider shows I've seen; it certainly seemed like there were a ton that wouldn't be used for dozens of episodes after being introduced, which was a shame since I liked a lot of the wackier ones (even with some of the CG not being the greatest). There were also a lot of top-notch fights in this one... shout-out to that final bout between Mach and Gold Drive in particular!
Overall, a show that I liked a lot more by the end than I did initially. If I had to choose between Drive and Zero-One as my preferred "Kamen Rider vs. robots" show, I'd prooooobably go with Drive. Next up is another one I've been wanting to watch since seeing the main Rider's base design: Build!
p.s. the Signal Axe is the best weapon ever