I like most, if not all, characters of a given franchise. The X-Men, The Avengers, The JSA, The Titans, The Justice League, The Defenders, The Outsiders, Fantastic Four, Legion of Doom/Secret Society, Masters of Evil, etc. I say: "I like that character". My friends tell me: "You like all the characters". Is this a bad thing? Is it wrong to have so many characters from a team that appeal to me? What do you think?
I like a lot of obscure or less popular characters so a guy I work with gives me a hard time sometimes. But then again he tends to only like characters that have movies: Batman, Iron Man, Green Lantern so he doesn't really know the comics so it doesn't bother me.
I think you may be taking this too personally. Your friends were probably just joking around. I say that to my friends a lot and my friends say that to me a lot. I like almost all foods and my friends say I like every type of food, but those that mean I should stop eating foods I like? Only if I'm fat, and that isn't the case.
All in all, just like what you want to and don't let your friend's opinions effect that.