My one concession to the family was to go with them to The Karate Kid, and it turned out to be better than I thought it would be. (I didn't have any high hopes. That Smith family is pretty good. It's a little annoying.)
I spent some of the afternoon reading at home, then went to a Starbucks, got an ice mocha, and nursed it while reading a dead-tree book, Daemon. I was the only person there without a laptop.
When I got home, the family was waiting for me to play Rock Band with them. (We don't have a good drummer, but you can't have everything, I guess. We mostly kept drums on easy.)
It was pretty much my ideal Father's Day. Gonna go wrap it up with an episode of Breaking Bad or the Moribito anime.