The Case—Please Hear Me Out—Against the Em Dash. I rarely use em dashes because I find them unappealingly long, and prefer a spaced en dash. As to the shape of the resulting sentence – which is the whole point of the article – I'm partially guilty, m'lud. I usually find the flow of a sentence can be improved upon by moving a dash-enclosed phrase to the beginning, instead of leaving it plateaued – like an awkwardly placed mountain you can't overlook – somewhere in the middle.