Oh, if you're making good beers I bet it'll take just a couple of tweaks to make it great. AG is great, but some of the best beers I've had have been PM beers so it's possible.
A couple of quick ideas- first, use a good recipe. I know that seems like duh! but there are some great recipes out there (free). Either our recipe database, or a book like Brewing Classic Styles by Jamil Zainasheff and John Palmer. Second- rethink your yeast starters (or lack of, I guess). Seriously, two things in my homebrewing career made my beer go from "good" to "great", and it's NOT AG. It's pitching the proper amount of yeast for each batch, and fermentation temperature control. Those two things can be considered one, I guess, since they both speak to yeast health and treatment. But that really is what separates the men from the boys, so to speak.