Batman's superpower is that he is a physically and mentally perfect human being who also happens to be obscenely wealthy and the DC Universe's best martial artist point blank. Psychologically healthy, not so much, but otherwise, yeah, he's essentially a superhuman when you consider all the shit he knows and is capable of. Plus, didn't he kick Superman's ass a couple times, without Kryptonite? I mean, hell, nobody ever says Iron Man has no powers. And all Stark has on Wayne is a nuclear-powered suit of armor.
TL;DR, the only guy who has no superpowers is Punisher, and even that's not true if you consider Born canon. And he can kill the entire Marvel Universe off single-handedly, so no superhero is just a "normal guy".
But yeah, the only time Superman has ever been interesting to me was because of Superdickery.com (Note: don't go there unless you have a good anti-virus program). Hell, even the 90s cartoon was dull except for that one episode with Lobo in it.