Never played Dishonored, so I can’t really say anything about it.
In order to really enjoy it you need to like exploring and roleplaying. The game doesn’t give you much to identify with your character or to give you an incentive to go on. You need to do this yourself. Since there are so many great mods available there are tons of ways to customise and improve the game. I would even consider some of them necessary. But what it comes down to is that you need to work a bit to make this game enjoyable. Dishonored sounds like a good game for roleplayers due to the game mechanics, but it seems more linear and story driven.