There are a few reasons why rice has traditionally been more popular in China than potatoes.

One reason is that rice is a more reliable and resilient crop than potatoes in many parts of China. Rice is grown in paddies, which are flooded with water, while potatoes are typically grown in dry soil. This means that rice is less vulnerable to drought and can be grown in areas with less fertile soil. In addition, rice is a more efficient crop in terms of yield, as a single plant can produce multiple grains of rice, while a single potato plant only produces a few potatoes.

Another reason is that rice has a longer history of cultivation in China than potatoes. Rice has been grown in China for thousands of years and is an important part of the country's cultural and culinary traditions. Potatoes, on the other hand, were introduced to China in the late 16th century and did not become widely cultivated until much later.

Despite these factors, potatoes have become increasingly popular in China in recent years and are now an important part of the country's agricultural industry. However, rice remains the most important staple grain in China, with per capita consumption of rice being much higher than that of potatoes.

There are many different types of dishes that can be made with rice, and the specific dish that is considered the "top" one will depend on personal preference and cultural context. Here are a few examples of popular rice dishes from around the world:

1. Jambalaya: This hearty Louisiana dish is made with rice, meat (such as sausage or chicken), and vegetables, and is seasoned with a variety of spices.

2. Biryani: This Indian dish is a flavourful mixture of rice, spices, and either meat or vegetables. It is often served with a side of raita (a yogurt-based sauce) or chutney.

3. Paella: This Spanish dish is made with rice, seafood, and a variety of vegetables and spices. It is typically cooked in a large pan and is a popular choice for large gatherings.

4. Fried rice: This simple and versatile dish is made by stir-frying cooked rice with a variety of ingredients, such as vegetables, meat, and eggs. It is a popular choice in many Asian countries.

5. Risotto: This Italian dish is made with a specific type of short-grain rice that is cooked slowly in broth and stirred frequently until it becomes creamy. It can be flavoured with a variety of ingredients, such as cheese, vegetables, or seafood.