Based on the pattern so far, my opponent may be following a simple sequence. They started with rock in round 1, then played scissors in round 2. If they're following a rock→scissors→paper pattern, they'll likely play paper next. Additionally, since I played rock in the previous round and won, my opponent might anticipate me repeating this successful move and choose paper to counter it. Given these considerations, scissors would be my optimal choice to continue my winning streak.