Excellent site for the Hobbyist Carries a wide range of parts for the hobbyist that can be difficult to get or find elsewhere. Good documentation and information on parts. Like the weekly emails with new parts or sales; often inspires new projects or applications.

I have enjoyed the resources I have enjoyed the resources, but I haven't really purchased that much. I do tend to use the resources though, and I think you contribute generously to the electronics/arduino community.

Easy to find layout and schematics Easy to find layout and schematic, in better than pdf or Gerber (i.e editable eagle files). This saves the additional steps is having to search for these open source files on git (like SparkFuns' competitor mandates)

Sparkfun offers good stuff Sparkfun offers unusual and useful things, sometimes on small boards that makes them accessible to people who do not yet have PCB design skills. And they make a lot of good information available on their website. A good outfit and the kind I enjoy doing business with.

SparkFun is my preferred parts and… SparkFun is my preferred parts and component supplier. Part of the goodness comes from the fact that I can get stuff in a day or two (I live in Arvada Colorado). My only complaint is occasionally they'll use a complex part whose manual is covered under an NDA from the manufacturer. This makes it difficult to impossible to open source my code that uses it.