You're not going to find much variety in Dover. There's a few pizza/sandwich places, greasy spoons, a grocery store and the Subway. Then there is China one.
China One by all means is a really decent place to eat. The fried rice is amazing and they go all out by adding veggies to it. The beef and broccoli is delicious and the crab rangoons are probably some of the best I've had.
Eat here Dover, god knows you need to expand your horizons.