I guess I've always tended to be a CB last type of guy. I tend to use more english than most, and am not afraid to do so, ala the Filipino players (although unfortunately not nearly as good). So where I hit on the CB is important, if I'm lined up correctly the OB will go in.
But since returning to the game again after a long layoff, I re-remembered that I worked on looking at the OB last on at least half of my shots, and it did take a while and felt weird but was ultimately better once I got used to it. Hard for me to put extreme draw on a ball without looking at the CB, but much like the golfer who putts and looks at the hole on his last stroke instead of the ball, you will contact the ball and it will most likely go where you intended, assuming your fundamentals are good etc. I even used that drill in golf and it was amazing, it allows your brain to just work like it should without you getting in the way.
For me, while I still like to focus on the CB on breaks, masses, extreme english (not used very often), jumps, and certain other types of shots, more by feel, there are definitely other shots that I'm finding that focusing on the OB last really lets me hone in on the OB contact spot and be slightly more successful with the shot. Just hard for me to let go, as another poster mentioned, but with practice that will come.
Great thread, and like so many others very timely for me personally as I was just working on this yesterday!
Scott