I've used the trusty old Fender 351 medium & heavy for quite a long time, but switched to Everly Star Picks a few years back.
They have a multipoint star punched out of the middle where you grip it, the edges catch the fatty parts of the pad of your finger and thumb so you don't drop them, and they don't turn around in your hand while you're playing.
I bought a variety pack that had all of their different thicknesses, but I generally lean towards the blue 1.0 mm or the purple 1.14 mm.
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