What a fun topic!
My name i've had since high school and use it on just about everything.....I'm noticing a trend here.
I originally chose it as a username for an online game (anyone remember neopets??) and it is based off of a 9th grade science project I had to do. Everyone in the class had to pick a satellite to present on and I picked Starshine because I liked the name and thought it was pretty.
The numbers come from a trip to Disneyworld I went on the same year with my high schools marching band. The group I was in got into trouble for not coming back in time to the meeting place on 12/31/02 because it was raining. We didn't realize that if it rained we
had to come back, we just thought it was a place we could meet if we wanted to get out of the rain until we were scheduled to leave at midnight when the park closed. Anyway, they looked for us for 5 hours and when they finally found us, the entire group (kids and adults) were so mad at us and treated us horribly for the rest of the trip so we stuck together for the rest of the trip and in a fit of teenage temper tantrums, we refused to forgive everyone for being mean to us. and as a way to never forget, I added the numbers.
My avatar is Mickey because I absolutely LOVE Disney. We go every year (this time 3 times! - once to Disneyland, twice to world). This past year I got engaged there, I'm having a Disney themed wedding, and we are going to go to Disney Paris on our honeymoon.