Oh dude... I don't even know where to start.
I have fantasies of one day retiring and playing all my old DOS games and beating all of them. I'm sure my wife at that point would divorce me and my kids (and their children) would never see me, and it would end up not going well... so that'll probably never happen. But I'm so big on the DOS era that I've got two Case-Logic CD bags (250 CDs each) with every DOS game I could possibly find. Most of them are the "Collectors Edition" or "Collection CD" or whatever... because the vast majority of them never came on CD originally... only in the re-release.
There are so many...
The Origin games (Ultima and Wing Commander)
The Sierra games (Space / Police / Kings - Quest, Leisure Suite Larry, Outpost, Alien Legacy, etc...)
Star Control 1/2/3
AD&D Gold Box Series (Champions of Krynn, Pool of Radiance, etc...)
Mech Warrior 2/3
man... the list goes on.
I'll never find the time to play those games, ahh... life.