There REALLY isn't a one-size fits all. Your headphones/speakers and your music style will both influence the best EQ curve for you. My own settings tend to give an overall boost towards the low end, although things get just a little muddy if I crank the very-bottom end. I find too much high-end starts ruining the percussion.
I'd suggest going through the pre-sets until you find a few that sound good, and take note of what frequencies they're enhancing or ignoring. Slide each band up and down the full range and list for what parts of your music change from it, and work from there.