I think, as an adult, I've moved past the need to categorize people as "real" or "posers". I wear what I want, and I don't care if someone else thinks I shouldn't.
I have a tongue ring, and I adore the clothes at Hot Topic. I'm not punk, I'm not goth, and I'm about a decade or more older than the folks who typically shop there.
I'm not a poser. I'm me. I like what I like.
One day it's my pink chucks with the heart and skull shoestrings and a concert t-shirt, and the next it's a white button up dress shirt, a GAP denim skirt, and beige and turquoise sandals with 2 inch heels.
If it makes someone happy to see themselves as a cowboy, let 'em. If it makes someone happy to be a conservative Christian with a multi-colored Mohawk, why stop 'em?
If you like it, wear it. It's not being a poser. It's enjoying the details and options of life.