First up for Let's Go!! Rider Week is probably the most reviled of the Riders.
After the epic revival for the franchise that was Kamen Rider Black, it was decided to make the next series a direct sequel bringing back the fan-favorite lead of Minami Kotaro and give him new powers. The new series took a much lighter tone than Black, and was met with lukewarm fan reaction. It would be the last Kamen Rider series of the original generation, until Kamen Rider Kuuga aired 11 years later.
It was also brought over to the US by Saban Productions as Masked Rider, featuring a highly altered plot and new cast much like their earlier hit Power Rangers did. This was made as more of a sitcom with combat, then a monster of the week fighter like PR. It lasted one season and quickly faded away, and it is not fondly remembered.
I chose this guy to start us off, since he was the first Rider I ever saw. (Say what you will, Black RX did introduce alot of American youth to the franchise.) I can't speak for the original series as it is one of the few Rider shows I have seen none of, but I do like his design. The high collar and larger eyes really do evoke the Grasshopper that most Riders are based on.
Kamen Rider Black RX from Kamen Rider Black RX