Both. I like the feel of dirt when I'm planting and my nails are a mess most of the time, even with scrubbing, nail brushes, etc.
I even dip my fingertips in lemon juice in an effort to whiten them! I keep my nails short and don't waste money on manicures.
I do use gloves if I'm doing heavy work or working with rose bushes or thorny weeds, cleaning up debris, etc.