I tried out all of the normal available options just to see which is way better. It depends on how you like your hand placement and the size of your hands. Muscle memory is also key. Though you can train your stupid body to finally realize that you're holding a nunchuck/classic controller and NOT a GC controller eventually. I treat my electronics with care, but wear and tear, along with heavy pushing will still take its toll. My Wavebird (wireless GCC) is on its way out and official GCC died. However, this was AFTER TEN YEARS. TEN. FRICKEN. YEARS. WHAT. They deserve actual funerals and all. Of course, playstation, xbox, and gamepad controllers will be attending the funeral - assuming they can stay alive ong enough to actually attend it.
I say base them on functionality and durability.
Wiimote: whywouldyoueven (good for super simple characters like Brawl Metaknight). Very durable. It's meant to be shaken and stirred, of course it's durable~ You won't be doing anything fancy with these.
WiiChuck: now we're talking. Buttons are a bit funky and not as easily accessible due to the shape. Very durable; same as above. Doing anything fancy will be hard.
Classic Controller: better for those with smaller hands since it's just so thing and light weight. If you are a button masher (heavy inputs), you will destroy this thing before it's first unpacking day/birthday. The Pro controller has handles like a GCC, so you can alleviate some of the button-pushing-pressure, thus making it last a bit longer. This thing has the durability of a decent 3rd party GC controller. However, it has all the buttons you need to do wavedashing/techs/whatever.
Gamecube Controller: It's the masochist of the Nintendo world, next to the Gamecube and Nintendo DSfat. You can mash the hell out of buttons and jam the control sticks however you want it, the GCC just says "Yo is that all you got? lel weak bro." However, this is the official GCC, not a crappy 3rd party one. GameStop's brand of choice is OK, but it will die on you in a few months time. The official one costs twice as much, has a bigger cord, and better durability that assures it will last long enough to see several of its unpacking days/birthdays.
Buuuuuuuuuuut, by this point I'm sure you have your preferred controller.