there have been a few weekends in my past where I did community orchestra on Friday from 7pm-9pm, then to punk/metal gig from 11pm-1am, and then jazz band the next afternoon at a wedding....honestly, my training in marching band and school bands - both college and high school - trained me to be able to control many different dynamic levels, touches and feels.
so I physically know what a mp, p or pp stroke feels like, as well as mf, f or ff stroke and then I let my ears and knowledge of style/genre select the dynamic feel. Because of marching band, I know how to combine loud and soft strokes in the same pattern and in the same hand.
I rarely change sticks to create volume...I use 3A's in all of my stage band settings: metal; punk; jazz; country; rockabilly. I just change touch. I do change to hot rods or brushes for stylistic things....I always do train beats with hot rods because, to my ears, it has that distinct "choo choo" kind of sound. Obviously will use brushes for swing stuff, and gain that consistent "staticy" scratch sound of the brush. But I don't go to brushes for soft dynamics. We have a few pretty raucous versions of Cottontail, Topsy, Impressions...and others where we get pretty loud, and I use brushes in those songs
I don't choose cymbals because they are "quieter". I choose them to fit the texture of the music. I can make my 16" Zildjian A Rock Crash as quiet as my 17" K Custom Dark Crash, and can lay into the K crash like my rock Crash...(I don't do that though becasue I don't use it for those applications...mostly because of it's construction)
the coolest thign about what we do is the "art" side of it. We each have our own brushes and colors, and that creates our distinct sound/picture!!!