From the FF101 Jargon File (edited to add, for the benefit of those who can’t/won’t find the time to click on a link, with the full text of the “Nice Guys™” entry, added text in italics) :
“Nice Guys™” – The “™” marks the difference between men who are genuinely nice people and men who wail “but I’m a nice guy!”. There are two types, which often overlap in one individual:
1. a guy who believes that the simple act of being decent means that the universe owes him a girlfriend.[defn from Mickle]
2. men who are looking to date a woman with the appearance of a supermodel, and yet they continually whine about how “women don’t like nice guys – they only want good-looking assholes” [source] [more at the NiceGuy archive at Heartless Bitches International]
Now, from a comment by Caroline at Pandagon:
Incidentally, I’ve always thought the Nice Guy(TM) theme song is “Even Hitler Had a Girlfriend”, by the Mr. T Experience. It goes like this:
I still haven’t found a girlfriend
though I’ve tried a lot
So can you help me please it’s tougher than I thought.
The odds are pretty good but the goods are pretty odd
still at this point I’d take anything you’ve got.
You see this all the time nice girls in love with jerks
What could they be thinking, tell me how it works?
If I’ve got some problems well I wouldn’t be the first
but the ones I have in mind are even worse
And even Hitler had a girlfriend who he could always call
who’d always be there for him in spite of all his faults.
He was the worst guy ever
reviled and despised
Even Hitler had a girlfriend so why can’t I?
Life is full of contradictions hard to understand
and for every happy woman there’s a lonely man.
Nixon had his puppy, Charles Manson had his clan
but God forbid that I get a girlfriend.
Even Hitler had a girlfriend who he could call his own
to sweeten days of bitterness and feeling all alone.
I’m not as bad as Hitler but it doesn’t mean a thing
since they’d rather be with Hitler more than me
I don’t see why they’d rather be with Hitler more than me.
Sadly, no good YouTube videos are forthcoming.)