I know what you mean. Finding exactly "your" pick isn`t an easy task. Everyone has their own requirements for a pick, its shape and size, thickness and material. Guitarists often use different picks when playing different guitars. So you can only make an informed choice after playing a lot of different picks. I've tried a bunch of them, now I buy at
https://ironageaccessories.com/ and they fit me perfectly. Now I choose the thin ones, because you hear the cleanest and clearest sound with them. The first one I had was a Tortex, and I still have it as a memento, even though it's pretty worn out.