For brush and dirty wood I use semi-chisel chain, for dirty big logs chipper chain. It's rare I get clean wood and run full-chisel unless experimenting with filing profiles on a log reserved for testing.
If factory angle is 30° for the top plate I file a few beat up chains to 25°. File height above the top cutter if OEM 25% then I come up 5% to 30%, if it's 20% then I come up to between 25-30%. This makes the chain slower and less grabby (good for smaller limbs/brush) and last longer before dulling.
With that said as a general rule I keep 2 chains for brush, 2 for hard wood (30° 20%) and 2 for soft wood (35° 15%). However I also have chipper, semi, and full-chisel, plus different bar lengths for most saws because I do landscaping and run into a variety of different wood, a professional feller
probably has far less variation and
likely sharpens a few strokes every tank or two, and I say that only for general comparison. I sharpen in the shop because it's easier to hold different profiles and I have limited daylight and often need to make the most of it.
@Philbert has posted a lot of information on sharpening and has been an excellent resource on pretty much any chain detail. The Search function works great for finding answers to most common questions and quite a few uncommon ones.
That's all to say I use a chain/bar combination suited for the job, so depending on what you do you likely want something unique to your needs.