He likes talking about himself and often talks about his experiences and thoughts.

He set out on a journey of soul-searching.

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

He should stop his selfish behavior.

His thoughts were as we expected.

I am surprised by this unexpected event.

This was truly an unexpected result.

When I hear that song, old memories come to mind.

He starts talking about himself at every opportunity, causing trouble for the people around him.

He is the type of person who thinks it's a moonlit night if it's bright, so he only has a one-sided perspective.