I found the most enjoyable aspects of Dishonored to be the player's freedom to explore multiple paths in eliminating targets and occasionally deciding their fates, which in turn influence future outcomes. The environments are beautiful and rich with ambiance, but the cartoonish character designs make it difficult to buy into the reality of such a delightfully grim story.
I preferred using stealth attacks and magic over straightforward combat, only because the combat system is so frustratingly limited. Corvo will be swinging his sword around like an oaf while your enemy is dodging blows and counter-attacking you like he was Oscar De La Hoya. I also found myself wasting precious resources on upgrading abilities that never seemed to serve any useful purpose.
Dishonored is an ABOVE AVERAGE game with a decent story but light on replay value. There is an alternate ending and achievements for players willing to play nicely, but such incentives aren't enough to keep me interested for an additional 15 hours.