Loved Sleepwalker as a kid.
Thought he had a cool design when they drew him more spindly and creepy looking - later on he got super buff for some reason.
The comics weren't anything awesome but I thought the concept was cool, they just didn't do much with it to explore his backstory or world (he was cut off from his people and trapped in one mind if I remember correctly).
For a character based in dreams he spent a lot of time just fighting idiots and then got addicted to a spectrum of light that some lady shot out of her body.
His main villain, Cobweb, looked pretty cool also.