I think a lot of people are kind of confused about what “good” technique is. The only thing you should be considering when judging technique is “Does it sound good and is the player conveying the idea that they want to convey how they want it?” Lots of rock players in the old days had what many people would consider “bad” technique by today’s standards because we are so used to hearing these virtuosos that have developed over the years and also all the polished studio recording that come out now. Every singer has perfect pitch because of autotune and every musician has perfect technique because you can punch in every note. They sound pleasing to the ear, but I would argue that it’s made much less interesting because those little “mistakes” that used to exist on recordings gave the artists their character. It’s also part of the reason popular music has become less complex over the years, because many of the artists that are pushed on the masses are even really that talented as musicians. They are more pre-packaged and regurgitated products. I would say that this is particularly true of pop country.
I digress, but to directly answer your question, it doesnt matter how you hold your pick or anything like that. It only matters if you like that way something sounds and are able to play it consistently like that.