@Michael_AtOz There is certainly a lot to think about. Thanks for the info!
Some of them are just for fun, but most of the editions of my Thing of the Week are practical: http://www.3dprinter.net/?s=week%3A
Here are a whole bunch of links for ways this guy has used his 3-D printer for “real” things that would be difficult to achieve other ways. He has light machining tools too (Sherline lathe and mill) so when he chooses to use a 3-D printer it is likely because he thinks it is best for the purpose.