Homebrew PCBs

Hello everyone..  forgive me for being so clueless.  i do some 
electronics work related to microcontrollers, embedded systems, and 
robitcs.  I've only done a few circuit boards myself and I barely 
know the basics.  I imagine that there's a lot more to know.  I was 
wondering how high the quality of the boards you people make are?  
Are you producing boards that are on a commercial level?  Something 
people would buy?  I'm reading some of the messages here.  I 
apoligize if this is a stupid question but I just wanted to find that 
out.  I have to run but i plan on stopping by again to read and learn 
a lot.  Thankks..