Describes someone of good character or pleasant disposition; easy to get along with.
彼はたちがいいから、初対面でも話しやすい。
He's pleasant-natured, so he's easy to talk to even on a first meeting.
その店員さんはたちがいい対応をしてくれた。
That salesperson treated me very kindly.
犬の性格がたちがいいので、子どもとも仲良く遊ぶ。
The dog has a good temperament, so it plays nicely with children.