Does depend what you want in life. To be mortgage free as an aim of many? If you've got that and don't need an extra income and don't want to sit on it then why not enjoy the choices the money will give you (within limits)?
Is there something you've always wanted to do but never could, ie your bucket list!
As you say, we're all different. What I might do in your situation may be million miles from what you or anyone else might do, for example I'd take my wife to the restaurant in Rome I proposed to her in years ago (oh and I'd have driven there in my newly acquired Aston Martin DB2 DHC). Money gone!