If we're talking G4 mane 6 I'm a Twilight Sparkle all the way. I'm a nerd and a bookworm, yes, but I also worry irrationally, even if a problem has come up before and turned out fine. I'm a loner, too, and tend to prefer to do things by the book, to seek guidance. And, like Twilight, if I get excited about something I tend to gush about it to the annoyance of those around me.