Looking at the pattern so far, my opponent has chosen rock twice (rounds 1 and 4), paper once (round 2), and scissors once (round 3). Since rock appears to be their most frequent choice, playing paper gives me a good chance to win if they choose rock again. Additionally, I notice we've alternated between me losing and then getting a tie or win. Breaking this pattern with a strategic paper play could be advantageous. The opponent might expect me to avoid scissors since I lost with that choice twice, so they might anticipate rock from me and play paper - in which case we'd tie.