Sure, I could drop $4.99 Angry Birds or the original version of Pac-Man (as opposed to Pac-Man: Championship Edition), but I'd rather save my hard-earned cash for something I really want--like Game Dev Story.
For those of you who have never heard of this Kairosoft-developed title, it lets you manage a game company as it attempts to create a million-selling game.
Players get to create said company's game console, develop an array of games (including "dance RPGs" and "ogre racing" titles, according to this hilarious Wired article), hire/fire employees and more--although not necessarily in that order, of course.
Anyway, it should go without saying that if Game Dev Story were available on the Mac App Store it would be sitting on my desktop already. Here's to hoping that happens sooner rather than later.