If you could chose one main attribute that your partner/future partner would have,

what would it be? i.e. it could be something physical - curvy, long hair etc, or a part of thier personality - funny, confident etc, or even an interest in something - football, travelling etc?
If you HAD to chose just one, what would it be?

Shallow as it may seem, I would have to pick 'nice eyes'.... eyes I could look into for the rest of my life!