I don't like the way that stack of paper is looking at me... Princess, I think you've been working too long. The sun's been up for thirty-six hours straight. Could you rotate the planet and get some sleep already?!
5AM: Wake up 6AM: Raise sun 7AM: Prank Twilight 8AM: Work 9AM: Work 10AM: Work 11AM: Work 12AM: Cake 1PM: Work! 2PM: WORK! 3PM: WORK!!! 4PM: Go insane and molest something 5PM: Work 6PM: Set sun 7PM: Cake 8PM: Sleep
You know, considering the small hints in the show, I think she wants to be like everypony else. She loves being a princess, but she hates to be put on a pedestal. She wants to hang out and have fun, go to parties, prank ponies and maybe even have a sleepover.