After analyzing the patterns, I'm choosing rock for two reasons: First, if my opponent follows their pattern (paper→rock→scissors→paper→rock→paper→rock→scissors→paper), they would play paper next, but they might anticipate I'd counter with scissors and play rock instead. Second, my opponent has successfully countered my last three moves, suggesting they're reading my strategy. By choosing rock instead of the scissors that might be expected, I'm breaking my own pattern while preparing for a potential strategic adjustment from my opponent.