Without a doubt it's Stella McCartney. It's so light and fresh, not too overpowering, and men seem to LOVE it! Even my best guy friend, who is totally not the type to notice anything like that, leaned over and told me he couldn't help but notice how great I smelled!
The second most complimented perfume I own is Sin by Kat von D. This is very strong (for me) but still sexy and mysterious, never too overwhelming.