Interesting Question xD Doggie vs Katsu

So, K-sensei asked me something interesting. Goes something like this:

She says she's weak in sports and father says she has no motor nerves (or isn't athletic). But she grew a love in golf. As she kept on with golf, she learned to enjoy it despite her weakness.

So she asked me recently, "I wonder, what is your fight"? (自分との戦いだからかしら？(^^)) Or it was probably "my battle against myself"? Does she mean a successful struggle?

What could be mine: Courage? Stability?

To those who are reading this, what is yours?