My personal Top Ten favorite Office moments:
1) Michael marking his girlfriend's arm, because he couldn't tell her apart from her other asian friend.
2) Kelly Kapoor playing dumb and asking Jan if Michael "getting to second base" with her was an example of office sports metaphors , resulting in a desperately awkward Jan moment, and Kelly turns to the camera and winks, showing she knew exactly what she was doing.
3) The HORRIFYINGLY sad moment on the kid's show, when Young Michael says "when I grow up, I'm gonna get married, so I can have a hundred kids, so I can have a hundred friends, and nobody can ever say 'No' to being my friend!" The cat puppet asking the question's reaction is what makes it oh, so horrifying.
4) Kelly rushing up to Jim and going "Why didn't you tell me you had a crush on Pam!?" and Jim being almost forcefully taken aback.
5) Michael & Tim Robbins singing the "Baby Back Ribs" song at Chili's, while Jan sits in angry silence.
6) Michael proving that he actually IS great at his job when he needs to be, selling the branch's business to Tim Robbins' character.
7) Angela stating just why they have a fire drill to the camera, until the stress gets to her and she starts crying.
8.) Dwight & the whole office realizing that the "Samuel L. Chang" character was originally called "Dwight", but the search & replace missed one 'Dwigt".
9) Michael finding out Jim liked/likes Pam, and telling him never to give up in his happy voice, but stops, goes completely serious, and goes "NEVER give up".
10) "The only thing I'M worried about... is gettin' a BONER." 'nuff said, really.