Best ever: being part of a game of Space Invaders whilst belaying a leader who was dislodging rocks like a human quarrying machine.
Best this year: finally getting on a local indoor wall after a year-long lay off, discovering I was just as pants as when I stopped (ie didn't go down any grades).
Worst this year: falling pregnant again right after planning my first outdoor climb in a year and becoming too ill to climb. Maybe next year... <sigh>