Feminine? No, definitely not.
I have a small container of saffron under my nose. It is hard to find descriptors. I'm going to say it's a smell with rounded edges. Almost smokey, and almost bitter, but not really either. A bit spicy and floral in a muted sort of way.
I love the smell and taste of real saffron, but I don't seem to like many fragrances that contain it, with the exception of C&S Dark Rose. Maybe it's that saffron is commonly combined with vanilla in perfumes, and the combination is too cloying for me. But saffron alone is not sweet or cloying.
Here is an earlier discussion thread about saffron: