Or go dip into her novellas. There's a collected edition out now ('The Found and the Lost'). I think my favorite stuff of hers is in there. Or, if you just want fun, 'Changing Planes' is a delightful romp inspired by the misery of sitting in airports.

Seconded. As an SF fan since childhood, it’s one of the few that has really taught me something of the human condition.

That was my most likely pick.