None, truth be told.
I am bad at sports and fighting games, but I have never enjoyed either of them really. The former due to my lack of interest in sports in real life, the latter because beyond arcades or similar, I can't see the appeal in them, they are repetitive while having no story, atmosphere or characterisation.
Sarah Kerrigan said:
I feel the same about Dishonored right now, seeing as I am trying to beat it by killing no one, so it helps me practice stealth.
To be fair, the stealth mechanics in Dishonored are not particularly well polished. You can avoid being spotted in extremely obvious places, and yet you can be heard from half a mile away it seems.
Plus it has that really irritating mechanic where as soon as one guard spots you, they all magically know where you are instantly, even the ones who weren't even nearby.
I am currently trying to go through a pacifist play through as well. I am admittedly getting better at it, but there are some key moments where not killing anybody and being stealthy are borderline impossible.