I went to university intending to study physics and discover a unified field theory (which I thought would be really easy if only physicists would get their finger out). Along the way I discovered I really liked quantum chemistry (and QFT proved to be harder than I thought) so I did a PhD in solid state photochemistry. Then when I discovered there were no jobs in Academia I went to work for Unilever as a colloid scientist. Then after I'd made some money and paid off the mortgage I became a computer nerd, which is probably what I was really destined for all along :-)