I started as hobby, was in Army, somewhere to go each morning before I worked at a warehouse, kept charting by hand, listening, taking notes. To this day I wished I stayed in stocks than go into futures, seven long years of taking stock profits and over $100k to learn to trade futures. Seven of the greatest years in history till then and lost money overall. Yea, first thirteen years were a full time hobby as I was working full time elsewhere and attending school.
Growing up, we all learned to start and manage businesses, so I always saw trading as a business even though to me it was a hobby, when I bit the bullet to learn to program year thirteen is when it became a business fully, now doing something I never wanted to learn-it was like work. Year fifteen turned the corner and became CTA, few years later quit my job. I been Consultant few times for various companies part time, been offered jobs always turning down in Chicago/New York, I can't stand working with people, it is like they want to ask a question and just stare, I SOOOO much want to hurt them. LOL My staff can't stand when I show up, LOL I don't yell at them, I go to my office and scream bloody murder. "What the hell were you thinking".
It is a lifestyle if you want to think that.
Most might not have understood ETcallhome, but he said it best "The goal of every professional should be to become an amateur. Very few make it that far."
Am at stage in my life I am distancing myself from manual trading, reduced hours, use to day trade twenty hours a day and now some days five minutes I made my Goal and walk away. I have a staff, they have the grunt work. I want to go back to hobby of designing systems, let "them" back test and forward test.
I never found actual trading to be fun. I just manage risk, so I guess that is a Professional since I know of no hobby that does that. But I do enjoy overall Process. I have worked too hard to just stop.