1) Little Women
My sister was in the hospital when we were kids, and for some reason this is the only thing she wanted to watch. So we watched it over and over. I was too young at the time to fully appreciate it, but I do so much more now.
2) Girl, Interrupted
It's been a while since I've thought about this film. Winona Ryder, Angelina Jolie, and Brittany Murphy gave such excellent performances. Now I really want to re-watch this.
3) The Descent
One of my favorite horror movies involves a group of women that go spelunking. This film is so creepy, I always recommend it.