My favorite use (I mean, aside from the more obvious uses, like to run my GOG and Steam games, along with disks from my childhood) is to compile it with heavy d

My favorite use (I mean, aside from the more obvious uses, like to run my GOG and Steam games, along with disks from my childhood) is to compile it with heavy debug enabled, and using it in conjunction with IDA to debug game issues. It's actually got a fairly nice debug environment.