nother thing I require from Picks is that they maintain their "Edge" as it's that scraping sound that adds to your tone, for those that like crunchy scrapy tone ala every band with a breakdown, but I need it because it makes the notes i play alot more articulate and pronounced.
At one stage so got way to comfortable with the reduced edge of the JazzIII i always play with and then had problems playing with a new one, so now i play with a pick maybe 2 weeks max, and then change to a new one.