Platia is a great Greek place. I like Fadi's too for a quick, fresh Mediterranean meal. I'm at one of these places at least once a week.

At $9.99 for all you can eat appetizers and rolls, Zen Sushi is by far the best deal in town for cheap Japanese food. The fish selection is limited when you go with the all-you-can-eat option but they are fresh. Just don't over order or you'll have to pay $0.50 for each piece that you don't finish. Some rolls come in 4 and some in 6 so be careful.

For great authentic Thai food, give Simply Thai a try (http://www.yelp.com/biz/simply-thai-bistro-frisco).