Actually the GamePad has spoiled me.
To take Wind Waker as an example, your Item select and Map screen are naturally on the GamePad. Now that I got accustomed to this, I find switching back to the old menu-based systems and pausing the game to be overly cumbersome. It's just so slow and unnatural. I say, that screen is a keeper!
Not to mention off-tv play is genius (too bad that brings the menus back though ).