The + to saturation/vibrance makes the girl's skin look unnatural
Other than that, these are some very interesting photos.

Graffiti pics honestly don't do much for me. For the most part they all seem pretty much the same. Something would have to be really special for me to be impressed by this type of shot. Something about trying to make someone else's art yours just doesn't appeal much to me.

this

but it was fun to look at