No, I never played Diablo 1 or Diablo 2. Dungeon crawling isn't a genre I've played a lot of. I've mostly been into JRPG and simulation/strategy since my early gaming days.
Haven't really found any RPGs I've really gotten into since Lost Odyssey on Xbox 360. The open world hack and slash thing seems like it's taken over. I don't think people don't have the attention span for a proper RPG anymore with turn based combat and grinding countless hours for stats to beat super difficult optional bosses. I do have Disgaea 5 on PS4, it's more a tactical RPG. It's decent, but I haven't gotten around to finishing it yet.
I don't remember Lords of the Realm or Caesar. Back in the Civilization 1 days I played that, Colonization, Outpost, SimCity and SimCity 2000, and Pizza Tycoon. Some of the Tycoon games were decent. I thought about buying that Railway Empire on PS4, but it looks kinda dry. Plus I dig the war aspect of simulation games more than just building stuff. Planning and mounting a massive invasion of another country utilizing land, air, and naval units on Civ 6 is pretty entertaining.