I also prefer wireless controllers, cords are nothing but a mess and an accident waiting to happen. Though if they had a 10ft charging cable, then people would have the option to use them with a cord if they don't want to have to worry about batteries.
I like that the Wiimote uses AA, it means that I don't have to wait for the batteries to charge and can swap out my own whilst another pair is charging. It also means I don't have to hunt down a specialised battery when the rechargeables inevitably go dead. Using a Classic Controller also makes the batteries last at least twice as long.