Eric Schaeffer doesn't deserve the jibe that he is so egotistical
I can see how some of his other films might suggest that to some, but his clearly semi-autobiographical portrayal here of a declining career, depression, deep insecurities that express themselves in pathological self-hatred...all should disabuse any careful viewer of this idea.
Or even just the one scene, where she says "if you weighed ten pounds less, I would have *beeped* you by now". He responds, devastated, "that's the meanest thing anyone's ever said to me". I would invite anyone to contemplate whether a truly narcissistic actor with a swollen self-regard would write that line of dialogue for the character he was playing.
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See a list of my favourite films here: http://www.flickchart.com/slackerinc