He is a faceless Soviet apparatchik who floated to the top by chance.
In the end of the 90s there was a new PM in Russia every few months. Putin got the position because no one considered him a threat. After Saints Petersburg he had had a reputation of a loyal follower.
If Yeltsin retired a year later or a year earlier someone else would have been in power in Russia nowadays.
From what I've heard, he has Parkinson's and cancer, and may be on Dexamethasone as a medication, which leads to side effects of aggression and impulsiveness. Would explain what he's doing right now. If he's dying, then let's hope it's soon.
He's not his usual spry self of old. He used to walk around like a cocky idiot. Now his appearances are always carefully planned and often pre-recorded. I also thought his photo propaganda of riding around shirtless on horseback like a proper virile man looked like a classic over-compensating smokescreen. And now all this Ukraine business sure seems like a final act of making sure he has a place in the history books of great Russian leaders.