That's crazy. For me, I'm not a collector, I buy games I want to play, if it looks interesting to me, based on reviews or research, I buy it or rent it. I usually buy about 2-4 games per month, old and new, and rarely buy new on release, depending on what type of game it is or if it sparks my interest. I spend about 2-3 weeks on the games I bought, depending on my free time, which isn't a lot. After I complete them, I usually go back to my backlog and see if any games spark my interest, to be completed. After that I take a break, search online for some games that interest me, which is a hit and miss search. If I don't see anything remotely interesting, I don't buy any games at all.
I also never buy the same games twice for another console, like that dude on the video, that is such a waste of money and space. Buying CoD4 for both Xbox360 and PS3 is just down right ridiculous, in my opinion. It only causes more clutter, the way I see it. Luckily, I have very few friends who play online. Most are on Xbox 360.