The phrase "nice thing" typically refers to something good, pleasing, or positive. It is often used to describe an object, a gesture, a compliment, or an action that brings happiness or enjoyment. Full definition
One of nicest things about living in a hot climate is jumping right into the Spring / Summer trends. (mikialamode.com)
People are saying a lot of nice things about Black Ops 2, check out what they're saying in this trailer. (monstervine.com)
Wow...... I truly thought I was a bit strange that way, as I like doing nice things for people I care about far more than having them done for me! (datinggoddess.com)