It always makes me laugh when I hear med students talking about the "lifestyle" of EM. Shiftwork is difficult in the ED because you're always behind, never on top of everything you'd like to be on top of.
But this is also the beauty of EM; you're never going to totally master it, which, to me, makes it always challenging. It's not just the medicine, but the impossibility of managing it as well as you imagine you can. That being said, it's a hell of a lot easier than my previous life when I had a business repairing ships. We often worked 60 to 90 days in a row, in the rain, in the snow, and a lot of the time diving in freezing, black New York harbor in the middle of the night to assess the damage to some ship that banged into another.
To do EM you absolutely must love the chaos, the frenetic pace, and the crazy people we encounter. I've found that the frustration I feel after seeing the same drunks, the same 29 year old nuts who come in for the umpteenth time with chest pain, and the strung out drug seekers is completely undone by the thrill of the guy I did a cricothyroidotomy on, the kid I tubed in status, the 8 traumas I did on my own because there were 15 MVC's in a two hour period and we were stretched to the max. The monotony is always overturned by the drama, and the unappreciative are always overshadowed by the smile of a sick child's mother when they find there's nothing seriously wrong.