I'm in love with Yogurtland... you don't even know.
It seems like I keep going through fads (ice cream to gelato to frozen yogurt), but I hope this one sticks at least a bit longer than the rest. The place itself is self-help soft-serve yogurt in a bevy of flavors that change out regularly, however, there's always a no-sugar added flavor available. Personally, I love the NSA Strawberry Banana and the regular Green Tea flavors. For toppings, they have all kinds of fresh fruit, cookie crumbles, sprinkles and other traditional frozen yogurt "condiments".
The interior design is clean and simple and they have ice-cold water available in the seating area. I consider Mojo this place's primary competitor since the space and idea are essentially the same, but Yogurtland with it's new location near Old Town and the fact that it's cheaper ($0.30 vs $0.39 per ounce) make it my go-to frozen yogurt place.
Go at least once. Just do it.