Since that's his own concern, we better not interfere.

He should stop his selfish behavior.

He is sticking to his beliefs.

He says that what you like to do, you do well, so he practices drawing every day.

He always has a mischievous smile on his face.

He has a warlike personality, always playing strategy games.

He likes toddlers and is always playing with children in the park.

When her son goes to school, the mother always says 'see you later'.

Have a good day at school, son.

The fact that he likes that movie is truly a case of 'there's no accounting for taste'.