All the draft magazines called Nicks a primadonna. Makes you wonder if you didnt just spend 20 bucks or so on a pack of lies.
Sometimes draft buzz is wrong. Look at all the buzz on Cam Newton being a gifted but lazy athlete who will not respond well to the work needed to do well in the nfl. All he did was have the best rookie QB season ever and did it by earning a reputation for being the first guy in every morning and the last to leave every night. Sometime the buzz is just filler for websites and magazines.
On Nicks, I think you might be confusing him with someone else. I don't recall alot of talk about Nicks being a primadonna. In fact, he was considered a very high character guy. He was well respected and was the "mentor" to the freshman and redshirt receivers in his last season, even though he was a junior. Hell, he got Butch Davis to love him even though he was leaving early, and that something.