Looking at the pattern so far, I notice my opponent has chosen scissors twice (rounds 2 and 5), rock twice (rounds 1 and 3), and paper once (round 4). I won the last round with rock against their scissors, and they might expect me to switch strategies after a win. However, given that they've shown a tendency to use scissors frequently, and might attempt to break the tie situation with a bold move, I'll stick with rock. Additionally, if they're analyzing my pattern, they might notice I haven't repeated moves in consecutive rounds yet, which could lead them to expect me to choose paper or scissors this time.