My choice for years was the Fender Medium in White.
I would buy them by the gross..... for those in Rio Linda....that's 144 in the box.
My reasoning: the Fender medium picks had just the right amount of flex and stiffness for my playing style AND.... most importantly, the WHITE pick was easy to see if I dropped it on the dark stage. Have you ever dropped and tried to find one of those tortoise colored ones? It's like trying to spot one of those Duck Commander boys in the Louisiana swamp on the first day of duck season.
Since those things last forever unless you happen to get them near a flame (at which point they will nearly explode) I still have several from over 30 years ago.... as long as I didn't do a string slide with them, where they have a notch in them, I still use them to this day......some of them are slightly more "round" than pick shaped from use. But I can't seem to part with them. I finally did break out a brand new pick yesterday. It's brown, but then again, I'm not exactly on a dark stage these days so it's all good.