1)Re-establish the Russian Empire.
Putin's actions on Russia's periphery are basically reactive
2)Reassertion of the Russian/Ottoman axis (Geeze !)
The quick rap with Turkey is driven by (a) the desire to de-energize Nato linkage (Turkey is part of NATO) (b) economic reasons, especially oil and gas.
As to Trump fracturing the society:
Putin knows that the society is already fractured--that is what BLM is saying.
And no one can do worse than Bush/Cheney. That is why nobody, apart from McCain, wants or talks about
boots on the ground
However the main reason why Putin, an educated Russian with a long history in government and international politics, would loathe to see Trump near the nuclear button, is Trump shows a propensity to shoot from the hip.
So there we have it. Putin is between Clinton,cold, calculating, dangerously predictable and Trump. A rock and a hard place.