Now I am working full-time in Topcoder competitions. So Topcoder means a job for me!!!
To answer this question, I would say, my first submission in Topcoder.
But I like to think its yet to come.
Chess is major.
Movies whenever I get time
Never give up so easily.
I was hunting for a job a year ago and while that time I was reading an algorithmic tutorial from another website. The tutorial gave a link to Topcoder's tutorial. Then I found development competitions hosted in Topcoder and I gave it a try. Even though I lost my first competition, I really liked it.
Then I started participating in more competitions under Assembly and First2Finish tracks. Soon I felt this is what I have to do, quit the job and now I'm participating in Topcoder competitions full time.