Eh....I have a lot of cologne. Hard to pick out a favorite of em all, so I'll split it into categories.
Fresh/Citrus; Creed's Green Irish Tweed or Acqua Di Gio
Woods; Gucci Pour Homme, Creed's Bois du Portugal or Heritage by Guerlain
Romantic; Tea For Two by L'Artisan, Gucci Envy & Creed's Orange Spice
"Manly"; Creed's Royal English Leather or Yves Saint Laurent's M7
A lot of others I could list that are awesome and have received a lot of compliments, but I'd have to say that those are easily the best.
Tea for Two, Bois du Portugal, Gucci Pour Homme, Orange Spice and Armani Code I wear the most.