World of Warcraft, a few years ago I lived in that game. Most of my friends where there and in the same guild. From late vanilla to early Cataclysm we were always logged on and together. Some people probably think of it as a waste but I gained friends for life and had a wonderful time. Some of my most memorable moments happened in that game.

Well over a year total time played, if not over two. And I miss those times.