I agree. I'm most satisfied when I get something done and acquire a new skill in the process. It doesn't really matter whether it's in software, math, cooking, writing, etc. David Foster Wallace wrote about something similar, about how it's not really about the pursuit itself but overcoming the self:
"Schtitt’s thrust, and his one great irresistible attraction in the eyes of Mario’s late father: The true opponent, the enfolding boundary, is the player himself. Always and only the self out there, on court, to be met, fought, brought to the table to hammer out terms. The competing boy on the net’s other side: he is not the foe: he is more the partner in the dance. He is the what is the word excuse or occasion for meeting the self. As you are his occasion. Tennis’s beauty’s infinite roots are self-competitive. You compete with your own limits to transcend the self in imagination and execution. Disappear inside the game: break through limits: transcend: improve: win. Which is why tennis is an essentially tragic enterprise, to improve and grow as a serious junior, with ambitions. You seek to vanquish and transcend the limited self whose limits make the game possible in the first place. It is tragic and sad and chaotic and lovely. All life is the same, as citizens of the human State: the animating limits are within, to be killed and mourned, over and over again."