Do you read YA fiction?  If not, why not?  Did you read it when you were younger, and then stop?  On some level do you consider it “less respectable” to read or write it than to read/write literary fiction for adults?  Can you define the difference?  If you wrote a novel intended for adults with an adolescent protagonist and a publisher said they’d take it but only if they could market it as a YA novel, would that be cool with you?