I'm not sure I can articulate this well. The motivation for you? Was it the popularity of the computer: open to almost anything? Was it the cents [USD] or sense: the mind find, brain twists and turners?
Certainly the mental challenge enters into it! But why-- for you?
My interest is in Society and reaching goals. Two players, tight rules, and "The perfect game ending," or game play. The elusive "Never a draw."
Then, there is the marriage between game and fame with its compensation[s]. Is that the main drive?
I like the growing mind and not so much the entertained
endeavor. Luck and pluck. . . like the duck who reaches the opposite end of the pond, one web after the other.