I don't use picks on every song, but when I do, I prefer thin picks. I use .5mm, which I know is very thin for bassists. Recently formed a new band, me and the 2 guitarists all wanted to get custom picks with our logo, so I designed them and placed the order. I got .5mm, and they each for .6mm. Not too significant of a difference, but amused me.
Anyone else?
Anyone else?