Comedy movies are best for watching with families. You should also watch award winning movies with families and such movies provide you some useful message.
Nowadays finding a movie that the whole family can watch can be difficult. Over the past couple of years it seems that Disney and Pixar has produced a lot of family related movies. In other words, I try to stick with computer-animated movies like "The Incredibles" "Minions, and Toy Story type movies. Movies such as these tend to be a lot more wholesome and better fit for the family.