All depends on your perspective of importance for them. Sampras was still able to manage more Year #1's then anyone ever by peaking for the most important tournaments most of the time. He was a "slam guy".
I didn't like that from Sampras truth be told. He took the Masters events more seriously earlier in his career but he did what he had to do to be the best. I wish he would have took some of the lesser tournaments a little more seriously though.