What lasts in the reader's mind is not the phrase but the effect the phrase created: laughter, tears, pain, joy. If the phrase is not affecting the reader, what's it doing there? Make it do its job or cut it without mercy or remorse.
strong female characters are gaining popularity, especially in Young Adult books. Lots of people (Myself included) love books that have strong, independent female characters even though traditionally women are portrayed as weak and helpless.