I certainly understand the frustration of many who have seen this thread pop up time and time again. But the truth is, there are others, like me, who are happy to do our best to help a new guy out. As long as there are those happy to answer these questions....what's the big deal?
My real annoyance with some of the answers is the assumption that it "Doesn't make a difference...its all personal choice." There is an element of truth in that. But if someone actually knows what his or her priorities are,( stiff deck, soft deck, good at fanning, good at holding doubles,) then there are actual answers to this guy's question. Anyone who says, or implies, that it is all just looks has never tried bottom dealing with a Fournier or attempted to learn aerial packet cuts with a Stinger.
It is true that a beginner probably wont recognize a difference. It is also true that an expert can do probably any technique he knows with any deck put in his hands. But for intermediates who are venturing into some tough knucklebusters or trying to learn some crazy new flourishes, the right deck for the right technique really can make a difference. Try to learn a table faro with a traditional cut and without and I bet you money you will progress faster with a traditionally cut deck.
So if you are an intermediate or advanced "card guy" who has experimented with a lot of different decks and feel you have some valuable advice for the kid...by all means be my guest. If you are an intermediate or advanced "magician" you need to stop, take a breath, add up your card repertoire. If it does not include difficult flourishing, complicated shuffle work, knuckle busting card sleights, if instead the majority of your card work can be done with DLs, passes, simple controls, and you are still using the riffle force, then it is safe to say that you need not offer advice on this subject. You may be a brilliant and advanced magician with 20+ years of experience but if you are still relying on the simple techniques I just mentioned then you are still a "beginner Card Guy." So be a dear, back off, and leave this topic to the guys who know a bit about it.
Andy...I'm happy to give you the best advice I can. If you are worried about getting a drubbing on the public forum feel free to PM me.