To piggyback on Jimbo's comments...
Don't underestimate the importance of your personality type on your work life.
This book is great if you want to explore your Myers-Briggs Type Indicator (MBTI) and compatible career options. It's only $13. When you figure out what personality type you are (there are 16 distinct types under the MBTI system), you will likely be amazed by the comments. I'll leave it at that...
Here's a great introductory read. "Do What You Are" by Paul & Barbara Tieger. It looks thick but it's actually short reading as it discusses all 16 personality types and ideal career matches - you only need to read one out of the 16 profiles once you know which type you are.
http://www.amazon.com/exec/obidos/AS...644318-8033720