I stayed up late every night and ended up ruining my health.

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.

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

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

Kaya is my best friend.

He finished his work and went home at midnight.

He was working until late at night.

He is clearly a night owl, working late into the night and sleeping late into the morning.