My first computer ran DOS version 4 or 5, which was fairly quickly replaced by a machine running Windows 3.1 and DOS 6.x (I think). I was a kid then so I pretty much only used DOS for games, although once I figured out how to write batch files and use the echo command I found out that I could effectively "animate" some things with ASCII characters.

There was a time where I was actually trying to track down an old DOS machine so I could use Adlib Tracker on a real OPL3 chip, but now I just use DosBox since it's good enough.

I work here