The only thing that really ticked me off in any toku show was the ending to Kamen Rider Ryuki. It's really a shame, because it had an amazing story, great characters, excellent battle system, but the ending was just terrible. I'm hoping that Kamen Rider Dragon Knight fixes that little problem.
Uhm Den-o not the series it self more like the characters. i hated the Imagins because they all took the glory. i wish they if they possesd Ryoutaro they had to let him use his own voice just like in ep3 it seems in this way the hero really looked like an hero.
I like the movie truthfully, the suit design was incredible but the action was soooo stiff.
also, God Speed Love, the Kamen Rider Kabuto movie. Kabuto is pretty much my favorite Heisei Rider series, but that movie was a big ball of suck. The movie riders were lame too, IMO.
Pretty much every other Toku I've seen I've felt somewhere between undying adoration and mild indifference.