As I've said before I love clematis (and roses). At the last count I had over 30 (of each - I know I must stop buying them!) but as of today this is my favourite:
Clematis Triternata Rubromarginata
It is so delicate and pretty, and not at all like the more blousier ones which scream out "come and look at me", this one just sits there, silently, waiting to be aspied.
I do suspect though, that in time, another one may inch its way to the top of the favourite board, but we won't tell that to this one, will we?