The ones I own and wear (I switch frequently depending on who I'm pursuing/with):
Clinique Happy
Cool Water
Chrome (Probably MY personal favorite right now)
Aquai di Gio
Hugo Boss
Realm
CK Eternity
Candies
Armani
Mambo
Polo Blue
Intuition (Smells great in the winter time, not sure why nobody mentions it)
Curve
Lucky You
Drakkar Noir (I HATE this, but women love it, so I put up with it)
Randomly Axe, prefering essence and phoenix)
So, yeah, I own quite a collection, but I use it and keep it in a sealed box so it doesn't skunk out (yes, cologne CAN skunk, just like beer!)... it's amazing the amount of people I can smell at a club who are wearing obviously nasty colognes, yuck