When pulling into my garage, more often than not, I'll be listening to some music or a comedy routine on the XM radio that I'd like to hear the end of. So in order to do that I have to:
1. Turn off the engine.
2. Press the button, with foot off the brake to get to ACC.
And when done....
1. Press the button again, with foot off the brake to go to IGN
2. Press the button again, with foot off the brake to turn off IGN.
Jeez.
I don't think ACC should be on the Start Button, just because that's the way the old key system was. Plus, there's no reason to have to go through ACC every time you start the car. I'd like to see a separate timed switch for ACC, which would automatically turn off in 30 min.