I recommend NOT having a signature scent! It's very limiting. I have a signature style of fresh or vanillic florals, but I like Fumerie Turque as well. I can't stand spicey, heavy, ambery, orientals.
I suppose at most, you could have a signature daytime scent. But you certainly must choose it on your own!!! #22 is a good candidate. I also wear Bulgari pour Femme a great deal in the day, warm or cool weather, work, PTA, etc. It is always appropriate.