i sort of did the same mate, i used to be really into computers website design programming building PCs and spent all of my spare time doing it. then i started working in it as a Systems Admin. I enjoy my job, as its something i like. but i dont spend anywhere as much time looking up PC stuff in my own time instead i looked for a passion that wasnt related to my work, and thats how i got into cars and motors and now i spend my time at work thinking about my car, and that. i think you have something which is a passion but once your doing it all day every day you want something else to get enthuasasitc about i would always keep my job and passion seperate, for me im lucky, as ive got two ;)