Meh, some of the simplest games in terms of controls and abilities can also be quite complicated and in-depth, and consequently, a great deal of fun. My favorite games are still old Nintendo puzzlers like The Adventures of Lolo and Fire and Ice.
But I do understand the feeling of games losing their lustre, so to speak. I have a ton of new games in my queue to play, but I just haven't had the motivation (or sadly, the time, to devote to playing them). The last game I really got into was Arc the Lad: Twilight of the Spirits, and it was a damn simple game, and somewhat entertaining, but meh. I am, however, looking forward to having the free time to complete Okami, Bombastic, and Final Fantasy XII. ;O