Vines add an air of romance to the garden, scrambling over a fence, tumbling across an arbor or twining up a pole.
They can be very practical as well; use them to create privacy and to hide unsightly garden areas.
Climbing roses are not really vines. In truth they are just regular roses with very very long canes. If left to their own devices they would arch and ramble and make a giant thorny, pretty when flowering, thicket. But with a little training and tying up, they serve the same function as traditional vines.