I really enjoyed 2004 at Shinnecock. The great course. Phil playing near-perfect golf up to the 71st hole. (And even there hitting an almost-perfect bunker shot.) Goosen performing the most magic I've ever seen on the final nine greens of a major tournament.
Also Pavin's win at Shinnie in 1995, with his astounding 4-wood 2nd shot on the last hole.
Casper's win at Olympic in 1966. He played fantastic down the stretch, while Arnie turned in his historic collapse. I think this tournament did the same thing to Arnie's psyche, that the 1986 Masters did to Seve.
1967, Baltusrol. Jack proved once and for all he was the present and the future of golf, and Arnie the past. I'll never forget his final round 65, or that huge 1-iron to the final green. This was also where Lee Trevino made his introduction to the national golf scene.