I have an epic plectrum collection which I amassed over the years. I sat down and played with all of them, and decided on the ones I liked the most, one of which was the Jazz 3 XL. Obviously different styles or songs may require different thicknesses, but I lean towards the harder end of the scale for my typical playing (blues, rock, shred, metal, jazz, lead and rhythm).
After reading many good things about these picks I decided to order some, not realising they are the smaller version and not the XL! I was a bit worried at first as they felt tiny! However it only takes a few minutes to adjust to these. I picked up a regular sized pick afterwards and it just didn't feel right! The XL and all my other picks feel too large now, still usable, but large, clunky and cumbersome. I used them properly for the first time in an hour and a half rehearsal and even though I was worried it would fall out of my hand it didn't, and my hands get a bit sweaty from time to time!
Great pick. My XL has lasted years with only minor wear, I can only assume these are just as durable! Excellent choice for many styles!