I don't think you should try to be anything you're not. If you're not smiling all the time or always happy - I don't think it matters. If you're having bad day, show you're having a bad day. Don't try to put up something that's fake.

When I do a movie, that's just a couple months out of my year and out of my life. All the other months I'm just at home, running around doing errands with my mom and going to sleepovers. I feel like I have that side of my life, and then I also do the films - which is just sort of a plus.