I dropped out of University twice. Computer Science didn't turn out to be as interesting as I had hoped and I was too young to appreciate tertiary education. If I had studied film I probably would have been more interested, but I couldn't see the career relevance. I have since regretted not having any form of qualification.
Recently, that all changed when I became a Zend Certified Engineer. The Zend PHP 5 Certification is the official PHP 5 qualification and is recognised worldwide. Although obtaining the certification didn't require 3 years like a degree in Computer Science, it does represent many years of mostly self-taught PHP learning and I'm proud to have achieved it.