Mm, yeah. Death Note comes to mind. Sorry.
First: am I the only ones who think L fans are like this? I mean, the guy's kind of an extremist, and not in a good way. IMO, he's weirdly sociopathic, he's kind of a major jerk, and he's in no way heroic (he only took the case because he was bored and thought it'd be fun, really), and yet these guys love the hell out of him for all the wrong reasons. He's creepy. I always liked him for the traits listed, but only because it was an interesting deviation from the typical "hero" characters you see nowadays. I dunno. I just kind of feel that people are missing the point with him, but whatever. That's just my interpretation of the character.
Second: I always liked Light. Like, a lot. I love men with crazy notions of godhood and a false sense of entitlement to power. I totally rooted for him, but I don't know if this is empathizing or just fangirlism. Maybe both. I dunno. 3:00 AM is not a good time to try and hash any of this out. -_-