well the second one is "different" to say the least. First one not bad, you did a good job getting the eyes to pop, but like others have said the yellow teeth take away from the otherwise pretty eyes, that being said it's an easy fix. I'm a big fan of the skin smoothing brush, just be careful not to go overboard and turn someone in a plastic barbie. That being said if you have a mother in law like mine that technique has worked wonders for the relationship.
I know a guy locally who does a lot of work with selective color in his photos, but it's mostly cityscape/walk around type stuff and it works really well for him and his subjects, granted he's been at it a long time. It's not something I'm terribly keen to try as I think you have to be very careful what subjects you chose.
