I personally use Black, Di Gio, and Cool water (Thats right, old school)

and post your age if you dont mind.
I only ask age, because when I was younger I liked and my girlfriends like completely different colognes than I do now that im a little older.
You can find grey flannel at most Ross and Marshal department stores. Not really my style, to musky for me.
I put one spray and thats plenty. There are some dudes that seem to bathe in their cologne.