Before I dive into the discussion of my Lindemann Syndrome, I feel I must respond to Greg's statement qualifying statement, "if you like old-school auto-scrolling levels in old platformers, you'll like DKCR". I loved DKCR but HATE old-school auto-scrolling levels, primarily because I was someone who also enjoys playing through such games as Mario with my finger glued to the run button, and old-school auto-scrolling levels just went far too slow for me. However, when there is much greater sense of speed or urgency in auto-scrolling levels, I tend to love them (re: Bit.Trip Runner and DKCR).
As for my Lindemann Syndrome, I know exactly how I developed it. It was during the Gamecube and GBA era when I would see a game in the wild that I was interested in but instead of purchasing it right then and there, I thought "I can pick it up later". After thinking this on several different occasions and returning each time only to find that that game was no where to be found, I decided to begin purchasing my games immediately upon release and play through them later, whenever I found the time. And now, between purchasing all the excellent games to have been released within the last two years and scouring eBay for NES and SNES gems that I missed back in the day, I easily have over 50 games in my backlog to play. My Wii and DS backlog reflects Shaymin's, and to compound the problem, I am often a completionist, and like happyastoria, I will usually only play one game until it is finished (although the DS has changed that since those games are not always epic quests that require your undivided attention).