Jeff, some others may chime in here that are more organized than me. I don't have any particular "go to" RT's because each song is different. The only exception up to now would be that I usually but not always gravitate toward the simpler bass RTs. I always start my songs in BIAB only because I'm used to doing it that way.

Once I bring the song into RB, I audition a large number of RTs for a song by generating a few bars. I undo what I don't like and make a note of what I like. Some get generated for the whole track. Others are either regenerated only in the bars where I want them to go or I'll generate a whole track then cut and paste what I like to a new track. With 2011 the RT's on my computer now actually generate faster in BIAB so I may change my workflow and try more of the tracks there before moving into RB.

As for organizing - I just use the sort feature so I can search by instrument, bpm, and even or swing. There are more choices now with the new time stretching engine which is good because the choices used to be more limited. Sometimes I experiment with something different just to hear how it sounds. The more I use RTs the more I know which likely won't work for my song but I don't keep a list per se.

Hope that helps a bit.