The panty-line thing shouldn't be a big deal. I think we should just all agree that panty lines are OK. Because the thong thing is... just uncomfortable.
Over the years, if you look at the films of people like Billy Wilder, Preston Sturges, Frank Capra, their supporting characters, even if it's a doorman with two lines, always seem three-dimensional. To me, that's a sign of good storytelling.
In film, there's so many little things where not just the actor can blow his lines, but technically, it doesn't quite come off in the perfect way envisioned.
If I know I have to memorize lines, I'm really gonna try to memorize lines. It's hard for me sometimes, because somebody wrote these words and you're trying really hard to get them the way they said it.