^ Agreed on the mecha. Toei really needs to take a look at Toho's work. Sentai's mecha battles have been on the whole unimpressive since the mid-90s.
Ryukendo was for the most part a fun comedy, but it has become one of the most overrated tokus of all time in recent years. It's almost sickening how some people will bend over backwards to worship this show.
Gransazer was definitely the best of the Sei Shin Series, though Justiriser did have better hero costumes. Sazer X ultimately had a good story, but lowering the maturity level to such an extent (And to a lesser degree, terrible suits and the loss of emphasis on the "God" portion of "Star Gods") really hurt the show.