Family Guy is one of my favorite shows, it always make me laugh. I always leave my DVR programmed to record it, so I can watch it during the week. American Dad is a good TV show too.
As some of you have said before, I think it's similar to the Simpsons, but I laugh more watching Family Guy than when I watch the Simpsons.
I live in Latin America, so those shows are usually broadcasted in Spanish here,but I don't like that because the jokes are less funny when they are translated. Fortunately I'm able to understand the English version

I just switch the broadcasted language on the TV and
voilą!