Yup - answer the previous questions (especially sun) and people will be able to offer more informed advice.
That being said, if conditions allowed, I couldn't think of a better place to plant something like Clematis flammula Triternata Rubromarginata than the seating area on the fence. It's a genteel clematis with pretty, fairly long lasting flowers that smell lovely...almost marzipan-like. Doesn't grow rampantly and the foliage is fairly delicate.
