Hasn't been in the bag long, but my Ping G10 3W is quickly going up the ranks in my all time clubs. Not just for the great shots I have and can hit with it, but for the reliability. I hit good misses with it.
It's great to hit a high, soft tee ball on shorter par 4's. I am also comfortable shaping the ball both ways with it, depending on my swing a particular day.
I haven't had enough clubs in my life to make a true list. Guess my Nike Method 001 is my favorite club of all time though. Been in the bag about a year now.