I have never played any of the Legend of Grimrock games. I probably would not have played Fall of the Dungeon Guardians either, but it came in a nice bundle so I thought why not try it out. Maybe one day I will try out Grimrock too.
I am one of those rare RPG players that did NOT like Eye of the Beholder. I found it too difficult when I played it years ago. But I am a big fan of active pause like in Baldur’s Gate and Star Wolves. Sure enough, I think active pause is what made Fall of the Dungeon Guardians more enjoyable than Eye of the Beholder.