This one is relatively petty, but I still find it annoying and stupid:
We have a 2009 Ford Fusion. In most respects I'm quite happy with it.
But you never know when you will reach to open the door and find it locked by the remote thingy in your pocket. The real clincher is, if the doors are locked when you release the trunk lid with the remote, the alarm goes off and continues until you unlock the doors.