Originally Posted by
threecheeses:
“He is in my top half a dozen. 
I guess we have had:
1: Kelly (Pop, though quite flexible)
2:Ruben (Gospel/R&B)
3: Fantasia (Gospel/R&B)
4: Carrie (Country)
5: Taylor (Country)
6: Jordin (Pop/R&B)
7: David (Rock)
8: Kris (Pop/rock?)
9: Lee (Pop/rock?)
Few question marks where I'm not sure but definitely due a jazz winner!
”
Taylor was Soul, or arguably Blues. Not Country.
Carrie was Country, but with Pop appeal.
Jordin was pop, but she stank.
Lee is Rock, but on the kind of scratchy generic side.
The producers don't eke out what genre hasn't been covered yet though. So what's "due" doesn't really factor. If they go for averages of what works MOST, its been Pop. Even with Kris and Lee as failures, they'll simply try and head towards the more predictable angle--the Diva. Carrie and Jennifer and Kelly all variants of that. Adam is kind of a male equivalent. Note that I'm not talking about the personality cliche of being "difficult" when I say "diva", but more the angle of it being a powerhouse soloist. Nothing too arty, and usually erring to the side of attractive.