how do you pick your next music?


Most audiophiles have a lot of music, and I find myself more often than not going back to the same 100 or so LPs or CDs... so how do you pick what you're gonna listen to next, or is it just a whim?
128x128nrchy
this is a recent post with a similar concern:

http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1302145976&openfrom&1&4#1
I have 2500 cd's and 300 lps none in order. Makes it much easier to just pick things at random
For me, it really depends on my mood at the time I am searching my vast library.
I have mine indexed by 20 genres. I like to deep dive genres. I am currently in Reggae mode.