Guys, what do you think of a sweet, quiet girl who suddenly stands up for herself?

particularly what would you think of a girl you're normally nice to but act out of the ordinary and are rude to, so she, to your surprise, stands up to you and boldly asserts herself? (not in a mean way but in a firm way)

do you think less of her? avoid her out of embarrassment? gain respect for her? walk on eggshells around her? ? like her more? find her more interesting? like her less?
Guys, what do you think of a sweet, quiet girl who suddenly stands up for herself?
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