What's the Most Important Skill for Long Term Poker Success?

Hi everyone,
In your opinion, what's the single most important skill for becoming a consistently winning poker player?
Is it bankroll management, discipline, emotional control, table selection, reading opponents, or something else?
I'd love to hear your experiences and what has helped you improve the most over the years. Looking forward to your thoughts!

For me, it's discipline. Knowing the strategy is one thing, but sticking to good decisions when you're tired, losing, or running hot is what makes the biggest difference over time.

managing capital, controlling emotions, and sometimes needing a bit of luck too