I kind of like theories that have some kind of non-kinetic kill-off of dinosaurs, such as a massive burst of radiation or a massive C02 release like the one from the Lake Nyos but on an even huger scale.
I always imagined that if a huge meteorite hit, there would be lots of completely crushed and dismembered dinosaurs instead of ones that got buried slowly in falling particulates, dying of cold and hunger.
Just kind of interesting to consider the alternatives.
But I will say this: A large asteroid strike has to be near the top on the drama scale.
If a big meteor hit there would be a lot of damaged living beings in the vicinity, but on the other side of the earth there would be slow death. We know that the dinosaurs all died. However small mammals and reptiles, and even birds survived. Crocodiles and alligators hide under embankments. Turtles have thick shells. Birds have feathers. Small mammals live in underbrush and burrows. Small lizards and snakes live in cracks and crevices. So one theory I have is that the bolide strike destroyed the ozone layer and large animals died of skin cancer and disease. Why did the small dinosaurs also die? Perhaps disease that was especially deadly to dinosaurs. Also why did the great marine reptiles die as well, in fact do we know if they did die at that time?