i use viking #100 insulated staples, i will not use uninsulated for a variety of reasons,being the state of Mass. state motto; we have a law for EVERYTHING! has an ammended NEC forbidding them.
larger NM gets plastic 2-nail straps which can be had , as you know, for round or flat cable.
Down here in Pa. where we dont have enough laws when it comes too electric ( have station wagon & roll 14-2, instant contractor) I still use metal, larger nm gets a plastic 2 hole.