I'm not a big cryer I have to admit, but the Boy in the Stripped Pyjamas gets me. I have never seen Kite Runner but I think we are going to watch it later today so should be interesting. I am also a big fan of The Blind Side, not because it is sad, but it's a really good story of a kid that could go completely the wrong way in life getting a chance. Plus Sandra B looks hot in it.
My fiancee loves dogs and anything where they die gets her every time, as in fact does most animal cruelty. The bit in I Am Legend where he kills the dog is a hard one, even for me.