I'm very conservative when it comes to movies that I allow my young kids to watch. I don't appreciate violence, romantic themes, name calling, or even bad attitudes portrayed in so many movies that I have attempted to share with my kids. My kids end up with nightmares or bad attitudes themselves.
I know that little ones will grow up and be exposed to "real life" experiences similar to what is found in movies. And I know that it is important to have family discussions about controversial themes in movies. However, I believe that toddlers and preschoolers are still too young for most of these movies that are marketed to them.
It probably goes without saying, but we don't watch much TV or movies in our house. At times, however, it is a nice way to share some relaxing family time. When movie time does come around, a few web sites have been helpful in determining which movies meet my conservative standards. Commonsensemedia.org and Parentpreviews.com are two sites which rate movies on a variety of elements, including violence, sexual content, language, and drugs and alchohol use. Commonsensemedia.org even rates consumerism. On both sites, you can read what other parents are saying about a movie.
Regardless what your personal issues are with movies - if any - these sites offer a good way to help you feel comfortable about letting your kids watch a movie, before you press play or buy a ticket.