Torchlight and Grim Dawn aren't really games you finish quickly, you can sink hundreds of hours into those games.
Part of my problem with ARPGs like Torchlight and Grim Dawn is that when I resume my character I like to re-explore the nearby area to grind for experience and loot. In Torchlight 2, though, this is less of an issue as only dungeons repopulate, so I just work my way through those again; the overworld remains as-is and only repopulates if you re-roll.