There are so many good DOS games out there. You should really narrow down what sort of games you like playing. Just on the title page I see classics such as:
Oregon Trail (Not the best game ever made, but it's short and a classic that is often refered to)
Dune 2, one of the earliest and best RTS games
Leisure Suite Larry 1, classic dirty adventure game
Scorched Earth, fantastic tank artillery game (ala Worms)
Doom, If you've never heard of Doom, gtfo!
Prince of Persia, classic platformer
Lemmings 2, another classic puzzle/platformer
Wolfenstein 3D, the birth of the FPS.
And I couldn't be arsed to scroll further down. As I say, narrow your field of interest and you'll get more help. Alternatively, you can go to GOG.com and buy many of these games there ready to run on modern systems without hassle. Usually only a few bucks.