I voted the man, and it's certainly more dh than me who sets the mood (his bad moods are really contagious). But in all honesty, I have been known to affect the mood, too. It takes more for me to do it, usually, and it doesn't happen as often, but it can happen. I'm mostly talking about bad moods here, since, in our family anyway, the bad mood (if there is one) prevails much of the time (and like I said, more so if it's dh's bad mood than mine).
Don't know if I made much sensebut wanted to be honest and say that I do sometimes affect the mood.
Don't know if I made much sense