I have a two sets of custom .style files that I would like to have ArcMap load every time I open the program. (Ex: the thematic color ramps from Color Brewer.) It's a small thing but I don't want to have to manually add them every time. Is there a workaround for this?
Welp, this is embarrassing but I seem to have answered my own question. :P (I'm new to 10.x, so that's part of the problem!)
It's under Customize > Style Manager > Styles..., and then I just needed to click "Set as Default List."
I'll leave this question up in case it helps anyone else.