I am one to live in 1, 10, 11 and 12. For me - 12 hasn't meant the coffee cup routine, but in my home group i have certainly led meetings, been the discussion leader....for me, service of small and big manner is often found outside the rooms.
I also don't think it's an either/or scenarios, nor that any number of meetings keep me sober. My sweet spot for meetings (4-6 a week, here at almost 21 mo) is more to keep me emotionally balanced, learn from others, and keep that part of my schedule a primary focus. I will always have more to learn- and in turn, share with others by my talk, actions, and every day life.