Do you consider wearing three different fragrances on three different parts of the body to be "blending"? Because I'll usually have a home-sprayed fragrance on my chest/neck, and then go out and test two different fragrances on my wrist.
I've done the LAYERING thing on purpose once. When I first joined Basenotes, I was given recommendations for YSL Rive Gauche PH and Azzaro Pour Homme because I liked Faberge Brut. So, last week, I layered Rive Gauche and Azzaro Pour Homme. It didn't smell bad, but I LOVE them on their own and generally prefer it that way. I'll have to experiment with more layering on my days off.