How to make my Greek yogurt taste better?

Well if you don't want to add anything to it, it's not going to magically change flavor. A big part of it is what brand you're eating. I've found that Fage has the best flavor, Chobani a close second. I haven't found any other brand that even comes close and I've tried quite a few. Mostly you just get used to it and eat it in small amounts.