When I was first getting into computers I played star craft 1 a lot with my friends, at the time I was also really into Linkin Park and they had just released a remix album. The album features an artist called Motion Man so I started using that alias on battlenet and eventually cut it down to just Motion - and that has been my main gaming alias ever since (likely somewhere around 10 years) . Although I did use a separate alias in the halo PC modding community.