Like I said, it works better for you and you like it more. That is fine. I prefer the looks of my M&P over the Glock. No gun is the end all, be all though. I've had some feeding issues with my 34 and 17. My other Glocks have been flawless as many other firearms i've owned.
It's all about dependability and trust. I know my GLOCK will go bang whenever I pull the trigger even if its wet or dirty.
I agree. You need to be able to depend on your firearm. With that said, just because most Glocks function perfectly, don't automatically expect your firearm to. It needs to be tested with your carry ammo. I personally don't carry a firearm until I have at least 400 flawless rounds through it. I've seen videos of Glocks not firing in sand/dirt/mud. There is always the possibility that something will not work in its intended way.
My Glock 34 and 17 didn't meet this requirement. The M&P this time has and continues to function wonderfully. I also prefer the trigger more.
Don't get into 1911s then. You would have to own a Colt and by your logic of having to go with the original over a copy, a Wilson Combat, Les Baer, Ed Brown, and others just wont do.