Except other dictators that killed people. A few come to mind. The problem is he will buddy up with China, Russia, North Korea and Iran maybe a few others. What will happen to the stability of that region? Maybe war could break out and this is the start of something bigger. I hope nothing happens. I guess we will just wait and see.
He is not going to buddy up with China or North Korea. As long as the South China Sea territorial disputes are not resolved, normal relations with China is not possible. Also, Russia is not going to prefer Philippines over China.
Except that duterte is kissing beijings ass.