If you follow this path, I think it's important to remind yourself that you're doing extra, otherwise you might just forget that that's one thing that separates you from many of your peers. It can be an important point of pride and continuing growth.
The catch is, depending on your environment that's not the extra distinguishing you, it's the baseline.
I've seen it first hand in some startups where you have to manage yourself, and you'll be the only one to give yourself the time to look back at your work, and make sure you're growing and making better things.
I also hope that the "extra" is done within standard working hours, which is an other argument to just have it set as "part of the job".
