We have the same issue too. My son is only 14 months, but we still rarely eat as a family. I work Mon-Thur and don't get home til 6:30 and that's when Brady eats, then we eat, since our dinner takes longer to prepare. I LOVE home cooked meals, that's the way I was raised, my Mom had dinner on the table every night. But we seem to do a lot of take out lately, like Pizza or Chinese. It's just easier sometimes. The weekends I have more time to prepare, so we do try do dinner together on those nights.
I guess when my son, Brady, gets a little older I'll be more strict about eating as a family, which we should, I believe it sets good morals and routine for a child. But until then, it'll remain what it is!!