KR Series I have completed(in order of completion)

Pros:
Two main characters who have amazing synergy.
Great soundtrack.
Awesome suit design.
Great pacing.
All forms are used equally, Xtreme form doesn't steal the show.

Cons:
Some two-parters should've lasted one episode.
Cop out ending, shouldn't have ended like that, though it is a feel-good ending I do feel the need to subtract half a point because of it.

Pros:
Hands down one of the most amazing finales in the KR franchise.
Main characters all get some form of character development.
Suit design is very creative and all are appealing to look at.
Soundtrack has some really good songs (Kakusei [Awakening], ELEMENTS, Take it a try).

Cons:
Extremely slow pacing for the first 14 episodes (Before Tachibana seals the Category Ace), though from that point forward the series picks up really fast.
IMO Mutsuki's story arc lasts for way too long and is at times painfully slow, though the end of it is very satisfying, also is a good villain for that period.

Pros:
Excellent soundtrack (Opening theme is amazing, I'm a sucker for ska music.)
Like Double, Eiji and Ankh have an amazing synergy.
Core Medals are an intriguing system for henshins.
The twist near the end was excellent, I wasn't expecting at all.
Final battle is the best one so far, my jaw was on the floor (not literally but you get the idea.)

Cons:
Series feels like it slows down near the end, but the twist sorta makes up for it.
PuToTyra combo takes the spotlight at the end, though for good reason I guess.

(MORE TO BE ADDED ONCE I FINISH THE SERIES)
Pros:
Dark atmosphere, high tension.
Amazing suit design, some of the best sounds in my opinion. ("STANDING BY..." is one of my favorite lines from a driver by far)

Neutrals:
Main characters barely communicate with eachother, which isn't a bad thing most of the time as that lets certain plot elements flesh themselves out.
Everyone in this series lies within the moral grey area.
A secondary Rider who's a villain. (Kaixa)
This is more of a personal issue (which is why I put it in neutrals) but Kusaka (Kaixa) really reminds me of someone who I once knew who was extremely manipulative and controlling of others, it really bothered me throughout the series.
Strange ending.

Cons:
Starts off fast but slows the fuck down half-way through, call it a sorta reverse Blade situation.
Everyone is a fucking asshole, it's kinda painful to watch at times.