I've found that there can be a chasm between "what people think I do" and "what I actually do." But also, there can be a chasm between "what I think I do" and "what I actually do."

If the system in which you operate does not attempt to measure this, I think it's worth it for anyone to measure it themselves. We can so easily be overconfident or underconfident. Collect the data and see the kinds of things you've actually been accomplishing over a year.

I'll feel like I'm getting nothing done, and then I look at the year's changelogs and realize I'm actually doing just fine for where I want to be.