Nothing wrong with what you're doing. You've figured out how to knit Combined style, one of several perfectly valid alternatives to English and Continental. Many people find it gives them more even results, and the purl is certainly easier. There are several other methods besides English and Continental and all of them are fine as long as you are getting the results you want.
At some point (when knitting lace, for instance, or doing elaborate shaping), you may prefer regular Continental purl to get your increases and decreases going in the right direction. Or you can make adjustments to your Combined knitting by doing what you already know how to do: "read" your stitches and figure out where the needle and wraps go. There's a good conversion chart from Continental to Combined at www.grumperina.com