I switched from Sales & Entrepreneurship (still sales) to Software Engineering... I wasn't bad either... Presidents club for 4 years and ranked top-10 nationally one year.

Why did I switch? Totally by accident... I started a business doing marketing/ web development, and had problems finding/keeping contractors to do web development for me. So I just learned how to do it. I ended up switching to full-time W2 working for a company after a client got into a motor cycle accident and couldn't pay me (condensed version)... My career progressed pretty quickly so I haven't really had the motivation to go back.

Wild how things work out :)