Blade suffers much from the issues with other popular characters, lot of people that like him without really having any clue why. They just know the name as opposed to much better characters who didn't have their rights sold off.
But he does offer a fair bit, unlike Iceman. Vampires are a staple, and their inclusion makes a lot of other elements much more relevent. Spitfire and Baron Blood allow for more classic WWII remnants, which leads further opens the stage for other Invaders. The number of different Vampire tribes offer a potentially very varied subset of enemies for us. Something OTHER then Test Subjects. Dracula's sons are valid characters in their own right, Xarus and Janus. Jubilee needs being a vampire to be even close to appealing.
Blade is however, nothing like punisher, he's a reasonable person who will work with Vampires if they're not trying to kill him. Spitfire, Hannibal King, Quincy. Reasonable Human when the situation suits his interests, as opposed to punisher.