I had an ipod. actually a few of em. they could never hold all of my tunes....
I only have 5437 songs in my itunes folder in my computer. I had a bunch more, but the hard drive crashed last year. so I have been slowly re upping my folder.
on my phone, i keep just a few playlists...
chill...down tempo/deep house electronic stuff...
rock out...anything that i can listen to while sanding to keep the groove. hard rock/screamfest stuff...