I'm another one of those Dinosaurs, but I use two fingers on the right hand, with my little finger behind the Tx. Most of the holding is done with my left hand where I only use my thumb for throttle and rudder.

So I do a little of both.

Like Klumsey said, it's what you're comfortable with. But I usually tell newbies to try to get used to two fingers on the right stick. It seems to give most people more control.