I'm 51, and have been interested in trains all my life. I have worked in every major scale (including full size) at one time or another. Today I focus all my energy on O highrail. (3 rail O) For a number of years, I actually made a living in the hobby industry. In 1992 I was the owner and designer of a large public display train layout at the Mall of America. If you would like to see the layout , it has been preserved in the pages of MR (Oct. '93, p 92) and CTT (Sept. '93, p 86). Now I spend my time working on my dream layout. With a 2000 square foot train room in my basement, and all of the material left over from the mall display, I have my work cut out for me.
UPDATE: It has been over 6 years since my cancer diagnosis. Two surgeries in Jan 2007 seem to have gotten it all, but one of the scars was I've lost much of my interest in trains. In May 2012, my oncologist said he didn't want to see me anymore. Time for a comeback!