Never really got into it.
But Ultima Underworld II was my life :)
Before the internet made everything too easy I had found secrets and powerful items throughout the game such as this beast: http://codex.ultimaaiera.com/wiki/Axe_of_Firedoom
(can't check the link at work, hopefully it's ok)
On my second playthrough I made myself complete it without ever sleeping (in-game) and I think I only used 14 hours, game-world time to do it.
Hurrah for old games :)