How do I choose good rolling partners?

The people you roll with significantly impact your development. Rolling with better practitioners teaches you defense and humility. You learn to survive, recognize techniques being applied to you, and find small windows to escape or attack. Rolling with peers creates competitive back-and-forth exchanges that develop timing and strategy. Rolling with less experienced practitioners lets you work on new techniques in a lower-risk environment. Avoid always rolling with the same partners because your game adapts to specific people rather than developing generally. Be wary of training partners who consistently cause injuries through reckless behavior, poor control, or ego-driven intensity. If someone regularly hurts people, politely decline to roll with them regardless of their rank. Size matching matters for safety, though training with people of different sizes develops versatility. A good training partner controls intensity, taps and resets without ego, and communicates about injuries or concerns.