I am always playing so damn much that I rarely get to see anyone ELSE play; friends and colleagues as well as living legends. The last concerts I actually got to see were The Black Crowes in 2005 and The Pretenders in 2006. The number of famous musicians I've been able to personally MEET actually exceeds the number that I've been able to see perform, which is really rather bizarre.
That said, Jeff Beck was yet another on that list of, "Man, I gotta get around to seeing them while they're still here." DAMMIT. What a giant.