2011 gets a lot of play because of the collapse, but I think 2010 was my favorite team that never accomplished anything. It still feels like a shame to me that Adrian Beltre's insane "I don't suck, Seattle sucks!" season was completely wasted when an injury plague laid waste to the rest of the roster. Wakefield and Beckett both fell off of a cliff. Daniel Bard was the only good thing going on in the bullpen. Only 102 games of Youkilis, 75 games of Pedroia, Jed Lowrie as himself, a failed bet on Mike Cameron in CF leading to Darnell McDonald being the main CF, Ellsbury lost for the season, Big Papi with a less than normal Papi season, etc..
And yet...watching Victor Martinez and Adrian Beltre in that dugout, with an offense that still managed to wheeze its way to the 2nd most runs in the AL behind those two was really enjoyable. I wish those two had gotten their own ring in Boston, and it would have completed the pattern of 3-year cycles of awesomeness all the way through 2013 to boot.