Boateng is my most used player of all time with 340 games and the reason is of course that he is an amazing defender and no one gets past him. Boateng is strong, amazing at defending (especially standing tackles) and he performs well overall. But he is bad at shooting and penalties. But you will luckily not use him as a penalty taker except for a ridiculous penalty shootout.
No attacker (or midfielder) gets past him.
He is bad at shooting. I try shooting with him after corners. It ends up in the crowd.