This is always tough, but in no particular order (and always changing) my top 10:
Moretti la Rossa
Ruination India Pale Ale (Stone brewery)
McEwan's Scotch Ale
Samuel Smith Oatmeal Stout
Sierra Nevada Pale Ale
And, a mention of a fantastic beer that is no longer made, due to a brewery fire years ag: Dixie Blackened Voodoo, brewed in New Orleans (now it is brewed elsewhere, and frankly, not the same). Anyone remember that gem of a beer?