...I'd be playing Zork. Seriously. I don't deviate from the Forgotten Realms often (which is odd since I've spent almost all of my NWN2 time outside of them), but Zork is a classic. A classic's classic. I'm talking your first text-based CRPG classic when the only other thing you had to occupy your time was Oregan Trail and Logo the Turtle. Probably one of your first real experiences with some sort of AI built into a game that in ways far exceeds the actual thinking algorithms that we enjoy now. It seemed like anything you could imagine doing with the environment could be done. To me, especially back then before I knew a little more about logic and design, it was mind-blowing.
ZORK – Rediscovering the Great Underground Empire
Do yourself a favor, and see what Amraphael has done with one of the genres that helped set the foundation of computer based fantasy. If I had some more free time, I certainly would be. It's one of the proverbial carrots I have been dangling on a stick to work towards getting to enjoy.
If I was a wiki kinda guy...I would think it was time to update this:
http://en.wikipedia.org/wiki/Zork in the See Also section.
Sands of Solvheil Series
Design Document for Sands of Solvheil I: The Ruins of Kazatharis
Design Document for Sands of Solvheil II: Beneath the Hearleforne
Design Document for Sands of Solvheil III: Crusaders of Shalihir