I once showed "Teenage Dirtbag" to a college class of freshman-level composition students. While none of them absolutely loved it, it kept the entire class in rapt attention, and no one complained that it was just "stupid" or "boring," which is noteworthy. They found Amber Lange and Thayer Mangeress two very well-realized characters, and Amber's poignant closing lines produced a flurry of involuntary hums and sighs. One guy noted that it had a low budget feel, and that he would have liked more special effects, changes in scenery, and everything else one gets from larger company productions. I saw his point but think the lowbudgetness also adds to the essential realism of the film. What my class found most intriguing were the open questions and room for speculation this film leaves about what _really_ happen to Thayer's father and brother.
"Teenage Dirtbag" may not be anything truly special, but it accomplishes what its makers set out to do very well: Taut and gripping storyline with excellent acting and characterization. Several years after seeing it, this film remains quite fresh in my mind.