I have quicker braking reactions with an auto trans and left foot braking,
but I don't recommend that for people who are not re-trainable.

Most people unfortunately, have learned to use the same foot for gas AND brake, but one action (pressing down) is quicker than two actions (lifting and then pressing)

I used to think manual trans and keeping the engine in the power band constantly were cool things.............until I drove it like that for a few days coming back from Texas..........and when the price of gas went through the roof..... -Bob

But if you like shifting, go for it! Do the hell and toe boogie!