Depends what you like to watch or what your favorite genres are.
I recommend Boondock Saints if you've never seen it. Good action type movie, but it is very violent so if you don't like violence and cussing and all....it won't be up your alley. You also said everyone, so this is definitely not a family with kids flick. I don't have a ton of kid friendly ones because I don't have kids, but Slither and Feast are funny horror flicks. Good classic comedies to own on DVD are Animal House, Caddyshack, Raising Arizona, and Blazing Saddles. Star Wars triology, the first ones of course and best ones....episodes IV, V and VI. Indiana Jones Triology worth your hard earned money. Full Metal Jacket and Saving Private Ryan are great war movies. Band of Brothers series is a great HBO series.
I agree with The Fox and the Hound, Shrek and Toy Story as FoBot suggested, too. Shrek 2 is also good, but the original is the best.