For me, I find RPGs so appealing because of the story and how it unfolds. Kind of like reading a good book only you become a little more involved by actually controlling that main charcater within the story as it happens around you. It is the story and how it is told, how it pulls you in. I really don't know how to classify ICO. An RPG? I think so, that game is a masterpeace. No other game has caught my emotions and told a story so well. A classic is the Final Fantasy game with Cecil the Knight, I think it was FF 2 on the SNES. Chrono Trigger is another title that is just a joy to go back and play again to relive the story. But with an RPG, it is the same as with a book, that first time is the best. You just get involved with the characters and the story, like the Lunar series. A well told story that is fun to play equals addiction. Someone else's imagination has captivated yours and effected your world for those brief moments that you have spent in an RPG.