I don't go far out of my way to do it, but it can be incredibly satisfying.
If I can use cod as an example, me and some friends are playing a sniper only game on rust, just for a laugh. one guy knifes me, which I thought was fine, an accident or an impulse or whatever, as I was right next to him.
But when the golden opportunity comes, line up a nice hard scope, wait for a good 10 seconds before pulling the trigger to make sure he gets it all on killcam, sees just how long he was in my sights for...
ahh, bliss