I almost never replay RPGs, or anything that has a story mode. I often pick up games again that are highscore base (Lumines, Project Diva f, racers, etc.). In general, my backlog increases faster than I can finish games, so replayability is not an important aspect for me. I actually prefer shorter games these days.
I do so when I've absolutely done a game, but usually some time passes in between. I replayed Portal 2 after 2 years of finishing it- it was my favorite game until I played Virtue's Last Reward. I replayed Bioshock Infinite almost as soon as I finished it, and I've gone through the first Bioshock several times. --- TU FUI, EGO ERIS. What you are, I was. What I am, you will be.
Only for completion purposes/platinum or if I really really really like the game. Usually not though. Mainly because I own 300 unplayed games and more than a 1/3 are Vita games. --- http://backloggery.com/main.php?user=yasume ~ PSN ID: Yasume90 ~ Steam ID: Yasume ~ 3DS FC: 0173-1277-5074