My collection is very varied to be honest but it doesn't feature a lot of war, i'm not against it as a story device but it's also not the first thing I think of.
According to the nifty collection tool over at bluray.com this is my collection
Strongly overrepresented: Coming of age, Film-Noir, Horror, Psychological thriller, Surreal, Teen
Overrepresented: Dark humor, Erotic, Foreign, Mystery, Supernatural
Underrepresented: Western
Strongly underrepresented: Animation, Other, Sport
'War' doesn't even feature
I was curious to see what 'Erotic' films I had in my collection mind you and was surprised with some of the films it come up with which might be erotic but not in a pure sense, such as Eyes Wide Shut and Bound.