I wouldn't say that cologne does anything for me passing wise, as I always pass nowadays. But I also do enjoy a good cologne. I save my favorites for occasions out of the ordinary, like going out to dinner, interviews, dates, etc. definitely gives a slight confidence boost knowing I smell really good.
For days with nothing out of the ordinary I usually don't wear any or wear aftershave. (I personally like the classic barbershop smell of Clubman Pinaud)
My personal favorite colognes are:
Polo Blue
Polo Double Black
Abercrombie and Fitch's Fierce
Bleu de Chanel
Boss by Hugo Boss