I cheered out loud when I first started tinkering with Julia, tested whether multiplication did the right thing with matrices and vectors, and saw that they did. Multiplying two row vectors should give an error! Element-by-element operations should get their own operator, not the other way around.

But as a long-time R user, I'm hesitant to bet the farm on Julia for a project at work where it would be ideally suited. Maybe there's a way to squeeze it in on the side.