Picture of my CD shelf, circa October 2005:
First row: Otomejuku idols (CoCo, ribbon)
Second/third rows: MM, Tanpopo, Pucchimoni, H!P general
Everything else (and out of frame): General J-pop, in alpha order
It looks pretty much the same right now; everything I've bought since the middle of 2005 is stacked on the floor nearby. All my laserdiscs (yes, LASERDISCS) are in my bedroom, along with the shashinshuu and some old videos. I have an Excel file that catalogs all my CDs and lasers. My DVD collection is scattered; I have every Musume PV, at least.
p.s. the 2001 MM solo singles are tucked on the first row, left side.