I joined twitter May 3, 2008 and can't believe it's been three years already! Early on I chose to follow about 100 people that interested me. Originally I reasoned that I may be able to keep up with the tweets of about that many people. I found even that was impossible and just dropped in and read a few pages of tweets whenever the mood took me. I never played the "I'll follow you if you follow me game" and publically tweeted that I…