Five different managers have taken charge of QPR this season but Simpson insists the turbulent campaign at Loftus Road has not got in the way of his major goal - first-team experience.
"Out here you are playing for your career," he told Arsenal.com. "No matter what manager comes in you still have to perform otherwise you will be out.
"There have been a lot of ups and downs but I have tried to stay focused on the pitch and on scoring goals. I have enjoyed it, I have made a lot of good friends and it has been a good experience.
"In previous loans I have played in a few positions but I've mainly played up front at QPR so I have had a chance to score goals.
"As a striker you will always be judged on the goals you score so it is important to keep a good [goals to games] ratio."