Thick straps are like skinny girls that wear oversized sunglasses. Some people think it's chic or fashionable others think they're just plain goofy. Personally, I don't mind a thick strap for casual wear. But If I had to go for a formal look though, I would definitely switch to something thinner. Like a nice suit, I'd want something that was clean, sleek, and fit well, not some chunky 6mm strap that made me look like I was wearing a freakin' armband.