I find that wearing anything only underarm (with unscented deodorant) diminishes the topnotes and darkens the base with my own odors, making some feminines smell like strange masculines. The only catch is losing the beautiful topnotes.
One thing I have also discovered is that other people's definitions of feminine often differ from mine. My wife thinks that Un Jardin sur le Nil is plenty masculine, but I find it very feminine. But she thinks that Bois d'Iris is "old lady", whereas I think it's a nice dark masculine iris/wood/smoky.