Looking at the previous rounds, I notice my opponent has chosen rock twice in a row (rounds 2 and 4), resulting in ties. This suggests they might favor rock as a comfortable fallback option. While there's always the possibility they might anticipate me countering with paper and switch to scissors, the repeated rock choices indicate a potential pattern I can exploit. By choosing paper, I can win if they select rock again, which seems to be their most frequent choice so far.