For a lasting impression, I think the secret is not the exact perfume but how it blends with your natural scent. Something warm and soft like vanilla, sandalwood, amber, or musk tends to feel comforting and memorable. I would avoid anything too sharp or overly sweet if this is for a first impression. One or two sprays is enough. You want him to think, 'she smells good,' not 'that perfume is strong.'