I'll say number one is the best as well. I don't mind the blown background and actually I prefer it because distracting elements are blown out.
#2
Sepia is nice, but this one is just begging me for proper color balance.
#3
You'll want to pull her away from the background. Having her that close to the background puts her into the same plane of focus as the BG. So now her AND the entire background are the subject. When you pull her out, you can blur the BG a bit and create some seperation which will isolate her and give her all the attention. Women like all the attention.
#4
I like how you have used the pillar to anchor the subject to the left of the frame. I like how she is seperated from the background. My nitpick here is that (IMO) you should have composed lower, so that the shot is a 2/3 or 3/4 shot of her...meaning that I think you cut her off above the waist.
IMO you should have either aimed lower or shot wider
#5
Love the tilt. Love that you are at an angle to the wall, which blurs the back a bit. I love the flowery splash of color. Great shot but I have nitpicks again: You cut off her arms, and ( I could be wrong about this) but her skin seems to have a magenta cast. See what happens if you warm it up a tiny bit or slide the 'tint' slider over a tiny bit to the green side.
What a babe.