I switched from briefs to boxers in seventh grade. Now I just wear what I pick out of the laundry basked, regardless if they are boxers, briefs, or boxer briefs. Really it depends on what my grandmother has washed and put away.
FWIW
I am a 35 y/o Female and Like men in boxer briefs 
I like to hang free and loose. I’m a boxers man. But not just any boxer. A boxer that is a size too big.
Of course, all my clothes are somewhat baggy. I like it that way.