I just submitted a tune for SLS15 consideration. I submitted "Crazy" from Gnarls Barkley.
I'm trying not to make snap decisions these days. In the past, I'd hear a tune I totally dug and I'd submit it for SLS consideration that day. Now, I try and sit on it for bit, giving tunes multiple listens before making such a decision.
After about 30 listens, I've decided "Crazy" is SLS worthy. It's different, funky and fun. There's room on SLS15 for different, funky and fun, right?