I have a lot of loose carts for various systems, mainly from my starting up habbit of buying any game I could find. I'm pickier now and prefer complete games all the way and in good+ condition. I believe there are enough games on my shelves now to pass up on common cartridges. As for CD-based stuff, it's all about complete except one time when I found a huge stack of loose CDs for $1 each. I had to pick up a whole bunch of RPGs, fighters, side-scrollers and lots of other cool games I really wanted despite no case/manual. For PC I prefer big-boxed games with everything however it's usually hard to find those bulky things so I will settle for a jewel-case/manual game, loose floppy discs are a no-no. I have a decent number of floppy based games and applications (like MS VB 3.0 w/manual, guide, old CompuServe ads, ect.
) that get installed on my 400Mhz PII machine with 700 somethingish MB of memory... Yeah, overkill I know.