See movies, music, tv, and books.
No one. I don't get the point of adding someone as a "friend" if there is no interaction afterwards. I use this site solely to keep up with bands I follow and those whose careers interest me.
Metal, goth, punk. Anything left of the mainstream...
Horror, 1970s flicks (the greatest decade for film), Kevin Smith, Robert Rodriguez, and Quentin Tarantino.
Earl, The Office, Simpsons, South Park, and basketball.
Klosterman, Simmons, Welsh, and others whose names I cannot recall at this time.
Batman and Daredevil. Oh, this wasn't "superheroes"??