Playing Assassin / Thief with Bow and Dual Daggers. I got one really cool kill cam early on with my Character stabbing both weapons in the guy's gut and lifting him into the air - But since then - nada - not talking about sneak attacks - just straight up knife fight. With the bigger weapons I get kill cam all the time. What I can gather - to get kill cam you have to be on the last enemy and your killing blow has to be a power attack - maybe my power attack isn't killing and the finishing blow tends to be a normal attack? I don't know.
Can someone confirm how the kill cam is activated and if dual daggers is a problem or they just svck at animations - remember -talking straight up knife fight - not stealth kill.

I think it activates if you finish with a critical hit, not sure. I don't think power attacks activates it though, I've done some with normal attacks.