For now, my iTunes situation is annoying in that I have my music library on my laptop and a video library on my NAS at home. I have yet to combine the two (I'm obsessively re-tagging my existing library to add information and re-ripping some CDs) so I'll post my music library now and my video one when I get home.
Of the 88GBs I have to say that 8GBs are from recent months of Howard Stern downloads (I have Sirius, but also download the daily show for an archive, keeping 2-3 months on my computer at a time) and another 6GBs are from a torrent I download monthly of ~100 indie/rock tracks of 'what's hot' - not hot, top 40 hot, but just 'good' indie/rock music. The rest are almost all CD rips at 256kbps, my lossless copies are kept in another folder for back up purposes.