I too am by ear, though I know a little theory. I like minor ninths.
I'm fond of minor i and iv with a major v. So, say, Am, Dm, E. It has a nice sort of European folk feel to it for me.
There's a song by the band Suede - The Asphalt World - where the chorus runs Dm/Dm maj7/Dm7 (which, as played, is effectively an F with a D bass) to G/G#/Am, then C/D/F/G/G#/Am. I love that little run.
Here: https://www.youtube.com/watch?feature=p ... ZLDDU#t=78
And another of theirs, with (essentially) another minor key semitone-descending baseline - The Big Time.
Here: https://www.youtube.com/watch?v=EXi7gTjv4qs
It sounds a mix of Am/E/G/D/F/Am/F/E and largely staying with Am but going down maj7/7/6.
_________________
Of course, it's probably quite a bit more complicated than that.
You know sometimes, between the dames and the horses, I don't even know why I put my hat on.