It's hard to describe how good #Ultima7 was when it came out. It had complex mechanics that you could experiment with and even abuse, so the path towards the end could get really fun and really weird. In the end that's what an #rpg should be about.
If you don't believe me just go and read the "Fear and Loathing in Forge-of-Virtue" walkthrough. An unparalleled masterpiece of glitch exploits and in-game absurdity: http://www.it-he.org/fear.php