During BadBadRobot's build stream, there was a tiny debate on what was the best way to apply thermal past to a CPU. I argued the dot method was the best, and a few others said spreading it even was the best way to do so.
While it looks like the final method he used had the best results as far as coverage, this shows you what happens when you spread thermal paste over a cpu before placing your cooler.
ALSO KEEP IN MIND that he is using different types of thermal paste. Notice how they spread different. Good things to keep in mind.