I pose the question: what games, if any, are your guilty pleasure? The ones you know to be bad and/or just plain outdated, but you still end up popping in every few months just to play a few rounds. Mine are:

Monopoly (NES version) - I don't know why, but this game just doesn't get old. THe NES version is the best console port I've found; unlike the board game, it moves along at a pretty fast pace, and the odd sound effects and goofy digitized voices (especially the jailkeeper's "Don't be comin' back now!") add an odd charm to it that keeps me coming back. Just don't play an eight-player game, as the CPU opponents are some of the stingiest bastards ever; they'll just buy up three or four properties and then circle the board gathering tons of money while refusing to sell their gains at any price, therefore making the game potentially go on forever.

Friday the 13th (NES) - Yeah, the mazes are confusing as all hell, Jason gets cheap hits on you any time he wants, and all of the "puzzles" really just boil down to playing random odds, but I still pop it in and play it on the odd day. I will defeat you one day Jason, even if you can kill me in four hits, run faster than Sonic the Hedgehog and take more firepower to kill than the UFO from the end of Metal Slug 2!

Dragon Warrior - More of a nostalgic favorite, mainly because it was the first RPG I'd ever played and also the first I'd ever beaten. However, its grind-and-travel gameplay does have a simplistic charm, and it's one of the only games I remember where you actually have to piece together clues from townspeople in order to find all the important items and finish the game; nowadays everything is just explained out for you in story scenes and talking to townspeople is just an enormous waste of time. Plus, hell, any game that makes reference to Nester is an okay one in my book.

There's my list. Let's see yours!