Tung Kee is now New Tung Kee and it is in San Antonio mall, next to Mervyn's. Large portions, low prices, tasteless.
Michaels is a great suggestion especially on nice sunny days -- and it's rarely crowded for Saturday or Sunday brunch/lunch.
In downtown Sunnyvale, what about the micro-brew place, Stoddard's? Really good food, but noisy -- not noisy if you sit out back on a nice day.
Burrito Real and La Costena make good burritos but they are no longer cheap and now have different owners; I haven't tried La Bamba in a while, but I liked it last time.
Wow, looking over this thread, I have now made 3 out of 6 responses, I guess food is WAY too important to me!