I've started watching 'A Boy and His Dog' several times but never made it very far. Not into the whole "let's look for broads to rape" thing. About the halfway point it turned less vile and I was able to make it through this time.
It always felt it was something I had to see.
Something tells me I'll never make it through the other movie I've started several times: A Clockwork Orange. Really too vile for me.