As a full-time graphic designer (for the last 13 years) who has worked with many graphic designers and is friends with graphic designers, I have to completely side with Lee on this one. By and large, in my experience, graphic designers do not hang around and do graphic design for fun. They actually prefer hanging out and complaining about their clients or marketing/advertising/creative directors over a couple of drinks 
Making logos for fun or on spec does happen from time to time, but I no truer words have ever been said by @Lee-White : no one is making a brochure "for fun." If you're making self generated design work, it's to overhaul or beef up your portfolio, which always feels like work.
All that to say, this is a great episode, and the argument about graphic design was the highlight!