I think the trait that translates best from college to NFL is pocket presence, and being able to consistently make all the throws from the pocket. And from everything I've read, Rosen is the head of the class in that regard. His accuracy also looks a lot better when you consider his receivers had 31 drops last year. He's also very confident in the pocket, trusts his blocking, and doesn't get happy feet. He was among the national leaders (might have been #1) in completion % when blitzed. From everything I've read, he's also very smart, in fact, his intelligence has even been pointed to as a possible negative, as in he's hard to coach because he questions everything. I'll take that in my QB any day. Give me a QB who is poised, smart, and confident in the pocket, has good enough arm strength, good mechanics and delivery, and is an accurate passer, and I'll let the coaches handle the rest. I get the durability issues, but I'd take that risk.