To reinforce Vanq's point...

I don't particularly find superheroes interesting. The only real concept of them I liked was the way Heroes did it.... Else I tend to find the genre uninteresting and the characters equally so. 

It is all based on personal preference. The anime threads do well because there is a higher demand and audience for them. Anime is also very, very general, while superheroes as a genre is a bit more narrow and focused.