They taste of what they eat, and you need to forget about all the rats you've seen in old Willard movies or late at night in NYC subway stations. From 20lb wild agouti, capybara, and a dozen others that eat wild fruits and nuts to cane- and rice-field rats, these animals are healthy, nutritious, and delicious. If you were to eat them in their countries of origin, you would be amazed at how superbly diverse their flavors are... and don't forget the guinea pig, the squirrel, the rabbit...
Speaking of rabbits, they are available, being raised for food right now in America, and underutilized by most. Clean and lean, this is one of the best meats you can be eating today. They are fast to raise, and stand up to any cooking preparation.