I love replaying, I'm a firm believer that games should be appreciated, not consumed. Unfortunately, there's a perfect storm of factors deterring me.
Between cheap games on Steam sales, free games from PlayStation Plus, and a steady stream of releases across the devices I own, I'm drowning in content and can hardly squeeze in a replay when I'm surrounded by new experiences to surprise me. Conversely, having a career and a fiance leaves me with little time to game anymore, the Vita is far and away the system I use the most, due to my commute.
I hinted at it above but I believe our gaming culture has become too consumerist. We judge each console and the health of the industry by its steady stream of titles and the press is more like a glorified buyer's guide, with the bulk of their reports announcing new games, chronicling their development and reviewing them once released. It creates a frenzied mentality where we're constantly pre-ordering and running through games for the sake of clearing through our backlogs. I remember one critique leveled against Polyphony Digital is that they dont release Gran Turismo games fast enough. This mentality undermines the spirit of artistry in this medium and our ability to really go back and appreciate what developers achieved.