When I am at gamestop or best buy if some people are asking the employees about a game genre, or the customers are hesitating between games, i do come in and tell them that from my experiences they shoumd buy this specific game.
For example Iwas at gamestop last week and a couple was hesitating between warhawk and Ratchet ToD i gave them the advice of getting ratchet.
Or if some friend got a new console i am going to tell them what are the must-have titles.