I don't have a cellar, I have a half-full drawer, however I often wonder where I'd be career-wise if I put the energy I put in whatever interests me in my job.
Not that I'm bad in any way but if you think of a day as 24 hours where about 6 are used for sleeping, 9-10 for working, this leaves another 8 hours which are used for browsing the net, reading this forum, walking my dog, being with my wife and kids...basically living! People who really want to push themselves use these "extra" hours for sport, learning a new skill, going over and above with their jobs, learn a musical instrument or language... This is getting philosophical and I've only had a sip of coffee so far. Are these people very selfish, using ALL 24 hours of the day for themselves? Or is it that time we spend with others, including relaxing, also time we use for ourselves?
Thinking about jobs, I'm thinking of a colleague who joined basically the same time as me, with a very similar skills/background profile, I've gotten 3 promotions in 7 years, she's gotten 4 and in that time she's developed a few specialised skills in her spare time that clearly give her the edge. Different family situation, I'm married with 2 kids, she just got married. Or if I think of another, even more career-driver former colleague, she's now in a very senior managerial position in a multinational company, but has been single for a long long time, she's basically using every waking hour for work, and occasionally for sport and spending the pile she's making
Am I happy with my job? Absolutely. Would I swap having a family and diverse hobbies for corporate glory and riches? Never in the world!
The point is, similar to the OP, that looking in my drawer and considering the thought I put in tobacco I wonder sometimes if it time well-spent, but then always reach the conclusion that using time/effort in a way that makes us happy, or keeps us sane, is time well-spent!