Solondz is pretty ruthless. One of my fondest memories of Dollhouse is the scene where Dawn wakes up from her dream and is lying in the gutter in NYC. I think that sums up the movie perfectly.
I need to re-watch Storytelling all the way through, but I liked Palindromes (not his best though). Happiness I think was his perfect film, it reminded me of a looser, more horrifying version of Shortcuts. Dylan Baker played the part perfectly. Though I've never had the urge to molest a young boy, I've been in similar situations involving porn and masturbation, so I think Baker got that weird, urgent type of relentless behavior down pat. Plus, he's naturally creepy. I think it's tough to beat Philip Seymour Hoffman masturbating on the phone though.
Also, that one woman who played the semi-main character, she's really typecasted huh? I remember her in Little Children, essentially transferring the role over and having to bear the wrath of Jackie Earle Haley's masturbation fury instead of Hoffman's.