I've been playing around with DosBox (DOS emulator) a little and was wondering if there were any classic old RPGs that I should try.

Or any other DOS only games you can think of, for that matter. I Never had a PC as a child so I feel like I have missed out on quite a bit

Lord of the Rings, by Interplay, was my favorite DOS RPG
Baldur's Gate

There are several real oldie CRPGs (as in need DosBox to run) mentioned here...

Play one of the old Ultima games! IV, V, VI, VII are great choices. Ultima 4 might be a little hard to look at these days, but it really started it all in terms of the great story of Ultima. My personal favorite is V because it's the one my dad had when I was super young and I played it w/ him. Really all great games though!