I am a Mechanical Engineer and I use my saws to prove that I mean business on the jobsite. Just kidding. Although it does open a few eyes in the labour pool when there's a tough tree to fell on a jobsite for whatever reason and I, desk jockey extraordinaire, pull up with my 7900 and wedge belt to take care of it for them. The look on the faces of the newcomers is always priceless :jester:
I used to cut pulp logs when I was in highschool and for the first two years or so of University. My father was a pretty hearty logger who cut for about 10 years and really knew what he was doing, so I learned well from him. He and I used to tackle some bigger trees (30-48" in the butt is a big tree for me) for milling and learning how to knock those down safely has paid off in the long run.
I also tinker with saws to keep my practical skills up. I work on all kinds of things like snowmobiles, snowblowers, lawn mowers, motorcycles, ATV's, cordless drills, anything mechanical. An Engineer who loses touch with the "maintenance side of things" and/or designing for maintenance is useless IMHO.