Gamepad exclusively. TV is left off.

Far more comfortable.

TV I really do not like the Gamepad controller, but I do love the Pro Controller....

TV because it looks better and I do think it's bit harder to play on the gamepad from the low resolution and slight lag.

Gamepad. Tv is in use lots of times and I also just prefer holding most games.

Television exclusively.

Around 50/50.

Set the GamePad's brightness to 4, turn energy saving off and unplug it so get the best colors. But it's still not perfect and the battery doesn't last long without the 2550 mAh battery.
It also depends on the games, some launch games are more washed out. The GamePad really needs a gamma setting.

A good mix.

Whatever I'm in the mood for.

Television.

Unless it's a game I want to play on the pad, while watching a tv show, or movie.

Gaming on TV. MiiVerse etc. on GamePad.

90% Tv & 10% Gamepad

I only use the GP for Dr. Luigi at the moment. The games just look and feel so much better on the HD Tv for most games.

I'll probably use the GP for eshop games once I get more of them though.