It seems different for everyone. For me it changes.
I Liked big folders for awhile but now I like lightweight small folders under 3 ounces and ~3 inch blade. I am like you in that I have a different knife for different activities. Delica walking the dog in gym shorts, manix 2 lw s110v hiking for a bigger more versatile blade and tomorrow I will be sporting the new folder from
@woodysone to church! I am no longer able to work but when I did as a financial advisor, I usually carried a small buck or sak. Good luck on your knife journey, that is half the fun as they say.