I have been steeping myself in Bowie lately and have come to the conclusion that he has an incomperable gift for choosing chords. I feel like this is the direction I want to take my music and I desperately want to encorporate some of his stylings into my own songwriting, but after a night of screwing around with chords on my acoustic, all I had come up with was a little Am to Am/G# to Am/G to Am/F# to F to Fm run (I think the first part is called a line cliche, but I'm not sure). Anyway, what are some things I should keep in mind for this kind of writing? I know it doesn't stay diatonic, and that's what's throwing me off, because I haven't learned much chord theory other than diatonics. What kind of theory goes into this kind of songwriting (the sort that's peppered with major-to-minor transitions and whatnot)?