I really like how Cicero introduces style in Book 3- style works "not so that some speakers are to be censured and others commended, but that those who are allowed to merit praise, merit it for different excellences," (199).
I admire Cicero's approach because too often comp teachers (myself included) can look at student papers and assume that there is no style or that the style is wrongly chosen. The way that Cicero describes it, if only for that moment, style seems like something that is appreciated more than sought after.