Kuuga: Take KR Black and mix it with a mystery about a policeman trying to stop a group of ritualistic killers.
Agito: Four Riders - three of them have compelling stories and one is as boring as drying paint. Guess which one got the most focus and the TV show named after him?
Ryuki, Faiz and Blade: Be aware that the first quarter of each of these shows is going to be boring. Eventually each of them slowly wake up during the second quarter and go on to be very flawed but nevertheless interesting shows with ambivalent endings.
Hibiki: The producer of Kuuga returns with a very different kind of toku show for the SHT program block...which is sadly bent over a barrel and forced to become more of a compliant toy commercial typical Rider show during it's second half.
Kabuto: Nice "back to basics" setup and a titular character designed to be love or hate. Sadly the plot falls to pieces during the second half due to various cast issues.
Den-O: The first all-out comedy show in the franchise. If you like, or at least don't mind, it's sense of humour, it's a fun show with hidden depths. If you don't like it's humour, get out while you still can!
Kiva: Another slightly slow starter that has the novel idea of following complimentary parallel plots in different time periods, but eventually tried to combine them and ended up getting hopelessly tangled up.
Decade: Took the idea of being a retro celebration of the nine previous shows, and a show about a Rider who travels between dimensions, and somehow fell through the gap between the two story ideas. Gives the impression that it got cancelled when in reality they just never got around to finishing the story.
Double: For many people, pretty much on the sweet spot as far as balancing campy, kid-friendly fun with some serious sci-fi. Draws a lot of character details from the original series and V3, as befitting a series at the heart of the blossoming retro fad.
OOO: A Rider who makes a deal with the devil and a show that wanted to ask big questions about what drives us...until it turned out that little kids loved Ankh and then it got retooled into a Double clone ASAP.
Fourze: The second all-out comedy show in the franchise. The same comments apply again here really, although it's sense of humour is very different from Den-O's.
Wizard: A show that wanted to be serious and epic, but also comedic and toyetic, and fell through the gap between those extremes. Of all the shows, this is the one that most wanted to be "just another entry" and avoid rocking the boat.
Gaim: Only time will tell how it ends up. Thus far, it has an intriguing story that tries to be a little too epic for it's time and budget constraints, leading to a tendency for grandiose expositional speeches. Would be a favourite of mine if only it could pick up it's action a little more.