Q: Whats so great about transistors?
A: There are a million analog circuits based on transistors and often you can accomplish your circuitry goal without a micro-controller.
Great transistor circuits page and downloadable PDF
http://talkingelectronics.com/projects/200TrCcts/200TrCcts.html
Transistors - Analog Circuits
http://talkingelectronics.com/projects/200TrCcts/200TrCcts.html
