I will say this, though, I really like Robert Ulrich, the casting director. He sees the best in everyone, and is endlessly uplifting and positive. If someone is just outright terrible, he will say they were "unique." He seems pretty sincere, and still in awe of the talent around him, and I both admire and envy those qualities. We'll get to choreographer Zach Woodlee later.
The first contestant to walk into the mock choir room is Dani, who I recognize from last season of America's Got Talent. Her bit on AGT was that she looked like Justin Bieber, and her rendition of "Baby" got her to Las Vegas but she lost a lot of sparkle when her gimmick was taken away and even followers of lesbianswholooklikejustinbieber.tumblr.com couldn't rally behind her. She's still adorable, though, and Glee could use a more realistic lesbian character, instead of accidentally deciding that Santana was one, then realizing they couldn't un-ring that bell.
Next into World of Pure Imagination/Giant Rubik's Cubes is Charlie, who is talented and stricken with ADHD. He is followed by Abraham, who is gay, Asian, and photogenic. Abraham begat Ali, who is beautiful and talented, and actually wheelchair-bound, unlike the guy who plays Artie. The other contestants had to have known that Ali would be here, in the name of math textbook-level diversity. Ali is looking to be more than just "the girl in the wheelchair," here but, if anything, being on a show that is all about playing to type is working against her.
Lily doesn't have a lot of tangible personality yet, but she's the "big girl" on the show so she'd better figure it out quick. Seven more people walk into the choir room without interviews or titles with their names in it, and Mario, the blind guy, rounds out the Final 14. The others were sure Mario would be there because he is talented and charismatic, but probably also because he is blind and Glee hasn't had a blind character yet.