Worse case of Impulsivity for me last summer was deciding to 'try something different' in the pattern just before entering downwind. Case in point, I decided to 'land long' and roll to a stop (in a glider) on the last 200 feet of a 2500 foot runway (closer to the hangar). Turning to base way early, and executing a very steep descent rate final leg seemed like a good idea at the time, and it turned out just fine, it was well within my capabilities, but my safety margins were diminished and the three CFIs that were watching on the sidelines thought that I had lost my marbles. (They gave me 'positive feedback' after landing.)

A safer way to 'land long' in a glider is to deliberately 'float' down the runway in ground effect (flare at the usual location with 10 knots of extra airspeed and keep the spoilers closed.)

Back to Impulsivity. It's good (in a glider) to 'change up' the pattern routine and explore the envelop of good/safe possibilities because this develops mental/pattern flexibility. I'm better prepared to adapt to last minute factors (like a moose crossing the runway at my 'aim point' when I'm on short final). But I think it best for me to brief for these unusual pattern exercises, on the ground, and before getting in the plane. That way I have time to think through the implications, and decide the best way to accomplish my goal.

More generally, when I'm in the air, it's good to 'stay ahead of the airplane', visualize what I'm going to do, develop a plan, and then execute the plan. Sure there are lots of times when I have to 'think and act fast', but that is different than acting impulsively. Impulsivity may be a bigger issue for sailplane pilots because so much of our immediate flying is inherently free form, opportunistic, spontaneous and quickly decided. That said, I want to stay ahead of the plane, even if I'm only 15 seconds ahead of it at times.