Feldman was good at playing obnoxious kids, which is sometimes necessary but rarely endearing. His obsession with Michael Jackson was probably 90% an attention ploy (he was a child star, after all) but still Creepy, even at the time. Plus, the guy basically posed as the Butch Corey, which was an awkward fit in a role few people would have wanted to play.
He was in the Lost Boys sequel, though.