I'm kind of partial to #5.
Couple of things:
#1 - The colors don't really look deep enough to me. Dunno if that's a levels thing, a saturation thing, or my monitor thing.
![Smile :)](./images/smilies/icon_smile.gif)
Take it for what it's worth. If you want to play with it, I was looking particularly at #3 and #8.
#2 - Looks like you used a flash on a lot of these flowers. Did you use a diffuser? Or a reflector, or any off-camera lighting? Notice the difference between #1 and #2, which look like a straight on-camera flash, versus #4 and #5 which have a very diffuse lighting, from an angle other than head-on. Most folks will perfer the latter.
Looks like you're getting some of that serious rain up there!