The different thicknesses become very personal and a part of your sound. I keep different thickness around in the studio because the tonal difference is way more noticeable to me when recording. I used the purple Tortex for many years, but found the blue ones (1mm) to be the secret sauce for me. Good snap, but enough thickness to dig in as much as you care to
That purple TorTex works best for me! It's my bass pick of choice. I've played everything from the orange TorTex (which work perfectly on electric guitar for me) up through (back in the day) thick, triangular tortoise shell and plastic picks, and a massive felt pick (ugh).
Yeah, purple TorTex is the one. Couldn’t remember the name, could only think purple tortoise... which just seems wrong somehow