Plain greek yogurt has a tang to it when unsweetened. It can make so many great dips!
For veggies:
Get a packet of ranch dressing mix and stir 1/4 of it into a container greek yogurt.
You can also use italian dressing mix.
OR just use Mrs. Dash
For fruit:
Make it sweet by stiring in a little SF/FF pudding mix or even SF strawberry jello mix
Or some waldens farm caramel dip
Or a little cocoa powder and sweetner
Some PB2...
It can also serve as a great sour cream replacer. Make tacos or a baked potato and top with greek yogurt.