Why are there so many different paint brushes? Because they actually do have different uses!
You’ll have to pick the right shape, size, and bristle type for the job.
For example, natural bristle brushes can be more expensive but usually result in a smoother finish. Unless you’re painting something like a fence, keep it under 3 inches.
On shape Reader’s Digest said, “The angled tip makes it easier to control the line of paint for a more accurate job. Choose a square-tipped brush if you’re painting wide, flat surfaces.”