I'm going to have to say 2005 has been the best year of my life. Early on this year I did a complete personality make-over, and I have been a better person ever since. I am now confident, optomistic, charming, and I generally have a very positive outlook on life. Plus, I turned 18 this year, which was cool, and I got a PSP, and, most importanly, a girlfriend that is absolutely precious.
Other good years:
1998 - Well, I was in fifth grade at this time. It was the last year of elementary school. This was the last year I was friends with the best friend of my childhood. We grew apart since then. Not to mention these were the years of Pokemon and Zelda: OoT. My friends and I were addicted to these games. I still hold the honor of being the first one in my class to finish OoT.
1999 - Got a computer. Been addicted to the internet ever since that fateful Christmas morning.
2004 - Bittersweet year. I had my first girlfriend and my first break up. No real loss, but it hurt at the time. My best friends in high school graduated, but I am thankful for the two years I had with them, including most of this year.