Hmm, in no particular order (I am only really familuar with sentai):
Best
Intial 5 Boukengers
Dekaranger/SWAT Mode Dekaranger
Hurricanger
Gaoranger (except for the claws, that was... retarded)
Kakuranger
Megaranger
Carranger
Zyuranger
Worst
Boukensilver. He's a fucking walking siren of eyebleed proportions and he doesn't even MATCH with the rest. Reminds so much of Signalman from Carranger it hurts
Abaranger. How much stuff can you stuff on a spandex suit, Abareblack?
Magiranger. Eh, they tried, but I wasn't feeling the capes and helmets
Timeranger and Go Go V. They remind me of Ohranger.
Ohranger. I hate the Ohranger outfits. Hate hate.