My name is
Leslie, and I love it.
Back in the 60's, when I was born, everyone named their daughters
Lisa,
Kim or
Michelle. I was always the only
Leslie in all of my schools.
I would only find it dated if you used it for a boy, as it was pretty popular for boys around 1930 or so. I don't see it dated for a girl because it never was a really popular name anyway.
Leslie, lucky mommy to
Scott (2000),
Delaney (2002), and
Larissa (2005)