A late opinion on the subject, but due to how the switches are constructed, the blues will click and "fall" after the key actuates. Its a much more pronounces tactile feel, and to me felt like it could really help with touch typing (don't have one, in store comparison of browns vs. blues). However, I personally could not stand how the key resets; took long on the upstroke for me to use it properly. I went with browns for a more... standard key feel (it is a single piece key afterall), and I haven't looked back.
I believe ripster made a good analogy to how keys felt a while ago, with blues being like a clicky ballpoint pen and browns to be somewhat akin to old school light switches... Please correct me if I'm wrong =p