If you recharge your batteries and feel like yourself again when you spend time alone, then you're an introvert. Introverts are more likely to be at home reading and enjoying quiet time and getting their energy from being alone -- and surfing the internet.
Two introductory articles about specific personality styles are The Introvert and The Extrovert. The Introvert article is much more popular than the Extrovert article; this doesn't surprise me because extroverts are more likely to be outside, socializing and getting energy from other people and enjoying the limelight.
For articles about introverted personality traits try:
Interesting Google trivia about introverts:
Google's "trends" charts is a cool tool that lets you see what the top trends of the day are. I investigated the search history of the words "introvert" versus "extrovert" and found that not only is the word "introvert" searched for much more often, "extrovert" didn't even make the charts until late 2005!
Introverts - or people interested in introverted personality traits - started searching for introvert info in mid-2004. Extroverts - or people interested in extroverted personality traits - started searching for extrovert info almost a year and a half later.
Interesting.