My buddy and I have been hardcore UT and BF players for quite a while. Ever since we imported Trackmania a few months ago, our UT and BF time has been reduced. While we don't necessarily have time for UT2004 or BF:V every day, we always make time for Trackmania -- every single day.
I cannot stress enough how clever, addictive, attractive, and fun this game is. Additionally, the game is stable enough that I have never *needed* to patch it, though the patches (especially 1.2) add features and content to the game.