As far as looks go...definitely tris...you can't really flex another muscle the way you can flex your tris, since it's your only major elbow extensor.
As for workouts...gotta love the feeling after a good leg workout. And you know all those pussies in the gym never do legs because of all the heavy weights being pushed around. I love when i'm doing squats and deads and i look around and all the pretty boys are doing curls and hitting the pec dec. I work out in a pussy gym...so it's probably worse there than wherever you guys workout.