Skillet Cooked Shrimp Texture

I was wondering exactly what a perfectly cooked shrimp's texture should be. I know the "rubbery" texture means over cooked and that if it's clear in the middle it's undercooked. But in terms of mouth feel and texture what should I expect? There is a "crunch" to each bite, almost like I'm breaking through some sort of layer. I just don't know if this is normal or not. I cooked the shrimp in a non-stick skillet on medium heat for about 5-6 minutes total and flipped the shrimp every 30-45 seconds.