It's pretty sad to me. Twilight wants and tries so hard to prove that she is worthy of this great power and position that she's been given. She barely gives herself any free time and often has a quite a few sleepless nights. She also has quite the tendency to try to please everyone at once(with a few exceptions like arguing with the townsponies that she and her friends aren't perfect and shouldn't try to be in Fame and Misfortune). Hopefully she'll learn how to properly balance her work life and personal life before she collapses from stress and exhaustion when Equestria has an imminent threat.