When I was a kid, I didn't get the early Ultimas or Wizardry, because they were (originally) on the Apple II and I had a C-64. So my first dungeon crawler was basically Bard's Tale (though I had a prequel to Bard's Tale from Hesware whose name I can't remember. Maze Master? Something like that, from the creator of The Bard's Tale and came on a cartridge).
Anyway, I was a big fan of them, beating all three (second needed a hint book), and it looks like there is going to be a new one, hitting Kickstarter June 2nd.