Bored.

But being bored is nearly always a product of not applying your ability to iterate abs improve.

For example: there are times when I have dozens to hundreds of parts to build/weld. I always end up going through them faster than nearly anyone else with much more consistent results because I iterate on the process as I move through the batch. A little process tweak here and there, and I can usually cut down on the time to competion by over 50%, and that's only within what's immediately in control of what I'm doing. I'm actively working on taking more responsibility, yes, so I can get paid more, but, also because I want to be involved in the process BEFORE parts get to me and the rest of the guys in the shop so we all don't have to deal with crappy parts, which slows us down and increases part variability, both of which are undesirable.