All things being equal, face-offs are a nice skill to have, but I would hope it doesn't factor into any decision overly much. Unless you're comparing the best face-off guys in the league to the worst, the difference really isn't as great as it's sometimes made out to be. An average guy like Pleks takes about 20 face-offs a game and wins 10 (50%). A face-off whiz like Konopka wins 57%, which comes out to 11.4 on 20, or just over one extra win per game. So while I'd agree that one extra face-off win per game is not a bad thing, I would never want it to factor into free agent selection more than skating, hitting, or shooting.