I'm in between. I run the cable housing under the bar tape until right where the tape has to go around the brake lever. That is a natural opening for the housing and it works perfectly.
I've also run the housing to the end of the tape, as Bulgie suggests. That works great as well. If it matters I also use Jagwire housing.

In the photo you can see how I have taped the housing just under the brake levers on Pepto the Peugeot PX. Sorry the bag is in the way, but you can see how the cables run to the stop on the down tube.