I loved Spider Man growing up, but past twenty years main line comics have been terrible. The clone saga, one more day , and killing Peter twice have all put me off him. The film's have been terrible (Maguire) to average (Garfield) and games have been mediocre lately.
Bat man I had little interest in, but he has really grown on me. Comics have been mixed bag for me, but he does have the best rogues gallery. His films have been good (Burton) bad (Schumacher) and great (Nolan). I consider The Dark Knight as the pinnacle of super hero films. His games use to be meh, but the Arkham series is the gold standard for me in super hero games. He also has the best super hero cartoon to boot with the 90s series.
So, even as a Spider-Man Man fan I confess Batman has been handled far superior in my lifetime.
