Foodies are people who enjoy cooking and eating different kinds of food. (INFORMAL)

A gourmet is someone who enjoys good food, and who knows a lot about food and wine.

An epicure is someone who enjoys eating food that is of very good quality, especially unusual or rare food. (FORMAL) =gourmand

A gourmand is a person who enjoys eating and drinking in large amounts. (FORMAL)

A gastronome is someone who enjoys preparing and eating good food, especially unusual or expensive food. (FORMAL) =gourmet
Bon vivant is a person with refined taste, especially one who enjoys superb food and drink.
可见，常用的就是foodie，意为爱吃（或贪吃）的人，其他都略含贬义，gourmet（读作：锅儿妹） epicure什么的简单讲就是food snob。据我观察，food snob真不少。