Vision

A favorite from classic Marvel comics, the Vision was an android created by the super-intelligent robot Ultron. He was sent to kill the Avengers and in turn became one of them.

Later was was to become even more human-like, and married the Scarlet Witch.

Vision was able to control the molecular weight of his body, becoming transparent and ethereal, or turning as dense as diamond.

Daredevil

Ah... when I was a kid, nothing beat riding the bike down to the local drugstore on a Saturday afternoon and buying four or five comic books for a buck. Then I'd ride back, sneaking glances at them as I rode, and then devour them for the next couple of hours, reading them over and over again.

One of my favorites was Daredevil... the Man Without Fear! As a kid, Matt Murdock is blinded by a radioactive canister, that also pushes all of his other senses into superhuman territories. I just never got sick of the stories, although in the 1970s, they got pretty cheesy.