I used to live by Armani Acqua Di Gio, but my girlfriend gave me a bottle of Versace last week and I really like it. Both are very light with one little daub, and unholy and overpowering with more than that.

+1 on the girls/guys who's perfume/cologne can be seen in the air with a lazer-pointer - haha - I encounter that all too often on campus. Not so much here, though, as I did at A&M.