hi hi i have like. over 200+ brushes and i constantly download new ones, but lately i've been using these sets exclusively. keep in mind that these are clip studio paint brushes!! unfortunately the magma brushes have been deleted by the original poster, so i cannot give you the ID number :[

ID number for the brocha exp brushes: 2092984
ID number for the onyx brushes: 1850374 [theres more in this pack, i only use the first and third brushes for coloring exclusively]

if this question was meant in the general sense, i prefer pencil brushes or anything with a unique texture. like if the brush seems neat or just catches my eye in any way, i'll download it tbh. i also really love oil brushes along with opacity and analog ones :] also thank you so much!!