I like greek yogurt in protein shakes that are fruity tasting. I took note from Bariatricfoodie.blogspot.com
about freezing greek yogurt in ice cube trays and adding the ice cubes to your shakes. I like to mix 0% plain greek yogurt with SF DaVinci syrup, usually banana, and then freeze that into ice cubes. Then I add two greek yogurt ice cubes to my shake. I've also frozen milk and added less liquid but more mil**** cubes to make my shake creamier. Both add the creaminess but I find the yogurt taste is too over powering for non-fruit flavours.
One recipe I'm currently liking is: 1 scoop vanilla protein powder, 1/3 banana (frozen), 3 whole frozen strawberries, 1 cup orange sunrise crystal light, 2 Tbsp. unsweetened apple sauce, and 2 SF Davinci banana flavoured greek yogurt ice cubes. It's based on the Jugo Classico smoothie from Jugo Juice and tastes pretty good.
You could also do different combos of fruit and fluid (like mixed berries, with milk and SF Strawberry davinci flavoured greek yogurt cubes would be good) to suit your personal preferences.
Hope this helps!