I used to have a custom Darky's ROM on my previous Samsung Galaxy S, I had an extra power-off menu letting me choose Reboot or Shutdown or even Recovery or Download modes. Obviously, I was using the feature to reboot the device pretty often; I'd like to have a one-button widget rebooting my device properly.
Also, about the apps which don't interest u..
*my tablet is usually about +/-2,5 sec every time I shut it down, not reboot;
*autokiller helps to save memory, at least I can be sure I don't have to start a game level again because of an e-mail or something like this;
*a decent root file explorer letting you see hidden system directories is a must just because any minimal and safe modifications do improve performance