The opponent's last move was paper, which would be beaten by scissors. Also, their overall pattern shows they've used scissors frequently (3 times), followed by paper and rock (2 times each). If they're following any kind of rotation pattern after their last paper move, they might play rock next - but even if they do, breaking my own pattern is important since they've successfully countered my last two moves. Since I've used scissors the least in my previous choices, it may be less predictable.