My wife's aunt, uncle, and three of her cousins are visiting for the weekend. Her uncle picked up the Avatar DVD at Costco and we watched it after dinner. My son (6yo) stood up and yelled "No!!!" at the screen when the (spoiler free version ahead) protagonist was in a particularly hairy situation early on, then decided not to watch any further. My 4yo daughter watched the entire thing.

I enjoyed it, but don't regret waiting to see it at home (even on my SDTV). The audio was fantastic and really gave the sub a workout. I think I was sitting in a particularly good spot because I could feel my pant legs vibrating during some of the air battle scenes. \:\)