I have three toppics for this kcm

1. Default Leave Option is an subitem of Offer shutdown options

2. the shutdown time is 30 seconds (from my point of view 10 seconds to give the user the option to cancel shutdown should be enough) so maybe an option for the time. I already have an old bug report and Thomas say also that 30 seconds is to long.
3. End current session isn't my prefered default setting. I'm for Turn off computer (but this is subjectiv and the only rational reason can be energy saving.