Now that you've got your color and texture down, it's time to check the stem end. That's the bit where the tomato was attached to the plant, and it can tell you a lot about the quality of the tomato. Look for a dry and brown stem end - it's a good sign that the tomato was handled properly.
When Is It Time To Pick Tomatoes | The Tube
And, on a totally unrelated note, have you ever wondered why tomatoes are technically a fruit? It's true - they're a type of berry, believe it or not! But don't worry, you won't find any tomato smoothies on the menu anytime soon.