I use brushes ,..alot,..always have, from the wayback machine painting figures, and I have always loved pure bristle brushes.
These are my good brushes Winsor & Newton, Vallejo, Humbrol-Airfix, and Tamiya pure bristle
These are synthetic ..notice the curled ends and actual afro happening on the one..lol
I like to be able to use the brush for anything and wash it in anything, including ,..sometimes Lacquer thinner, and synthetics do not like that. at. all.
Sometimes the inexpensive "bristle" brushes will curl too, ... you get you pay for basically