I hate kill moves. It is because enemies tend to kill move me with full health, mid-stagger, or from like 20 feet away. But when I do them, I like them. I would say my favorite is with a two hander repeatedly hacking/bashing their face with overhead strikes. I love the look of a greatsword completely soaked in blood from that. (Not a serial killer)...
For a moment, I wasn't sure... I love the one where the camera follows an arrow to the target. But I also love the one where you do that fancy swashbuckling move with the sword and slice someone up.
And then I encountered the one where you throw the opponent to the ground and stomp on their face. It was then, I knew my favorite. That is so badass.
I do not know if this is one of the kill moves but since it cut to full scene I assume it was. I have been playing with the Sorcerer build by Mason the last 2 days. Cordelia did the Halted Stream Bandit Camp quest. In the fort area before you enter the mine one of the bandits ended up being kind of held in place by the sparks spell from her left hand while the right hand ran her Silver Sword up into the bandits chest under the ribs.
I also like the arrow shot as well.
I've only had it happen once but on the Elven War Axe the handle has a sharp club-like handle to it, my character used that end to hit the enemy and then swung the "hawk-beak" end on the back of the head into them a few times. I'm not sure if it was a bug or not since I haven't seen it since but it looked pretty cool.
Nothing beats getting a decapitation with a single handed sword. That or even just simply running your enemy through.
I have to say though that some of the Giant kill moves are pretty cool, even though I've never actually gotten one myself. Honourable mentions go to the magic kill moves :P if the timing is right, getting a disintegration kill cam with lightening can look absolutely mind blowing.
My favorite kill move is the unarmed one where the player picks up an NPC on his/her shoulders and drives him into the ground. For wrestling fans it looks like a weird Death Valley Driver lol. A close second would be the two handed sword head chop. It never gets old lol.