The big controller was a god send for me during my melee days. I'm fairly flexible when changing controllers, but the way I worn down the analog stick grip made it better than any other controller (no slip lol). When I started playing brawl, I had moved to the Classic Controller, but realized that the Wiimote would drop its connection randomly, causing me to miss opportunities or get hit when I'm shielding (extremely frustrating). I decided to go back to the official controller and tough it out. Thankfully, with Brawl's custom design, I could make a setup that didn't force me outside of my comfort in holding the controller or pushing buttons.
Heck, I've been through so many controllers of different sizes thanks to Halo. I went from the official (S version) original xbox controller, then to a gamestop version (the small versions), then to the original xbox version http://www.blitterandtwisted.com/wp-content/uploads/2011/05/xbox-large-controller.jpg
That's not including my trip through GC controllers.
Heck, I've been through so many controllers of different sizes thanks to Halo. I went from the official (S version) original xbox controller, then to a gamestop version (the small versions), then to the original xbox version http://www.blitterandtwisted.com/wp-content/uploads/2011/05/xbox-large-controller.jpg
That's not including my trip through GC controllers.