Use which ever one works best for you. For me it is best to rack the slide as I have and shoot several different makes of handguns. By racking the slide I don't have to think about the difference in size or location of the slide stop.
I also so shoot week handed a lot so racking the slide works for me. The best instructors will tell you to find what works and stay with it, others will tell you that their way is the only one.
