I don't like strong perfumes, either. I get migraines and headaches very easily, so I have to be careful when selecting fragrances. The best I've found to be is Ralph Lauren's new perfume Lauren Style. It's very soft and feminine, definitely not something that could give me a headache.
I used to have this oil made specifically for putting in your hair. It was vanilla and it was amazing. I'd put a dab or two in the palm of my hand, rub my palms together, and then run my fingers and hands through my hair. My hair would smell of vanilla until I washed it again. It's not really a perfume, but my boyfriend ( now my ex ) always loved to smell the vanilla in my hair.