+1 on Centennial. My father in law grows hops for me, and I had an oz left over from last fall that I hadn't used. Brewed a couple days ago, and decided that the Centennial had lost a lot of AA sitting in the fridge vacuum seal bag, so I used some week old Cascade instead for bittering...BUT, the point of this is that I put a handful of the Centennial right into a glass of my IPA and wow what an incredible aroma it had and really livened up the beer.
Sorry for the side track. I dry hopped this same IPA with 2 oz of Cascade...but again it was last years harvest so I'm thinking it could have been better with fresh hops. Pellets would be the next best thing, instead of 10 month old leaf hops.