If the soil drys out, the fruit can crack, a common problem with inconsistent moisture. That's why a good mulch around the plant is key. Also, be careful not to disturb the roots when cultivating around the plant. There are so many varieties to choose from. Look for those that are resistant to such diseases as verticillium and fusarium wilts.
Tomatoes come in two classes, determinate and indeterminate.
Determinate ones are limited in their size, indeterminate varieties can grow 12 feet tall. Check out some of the heirloom varieties, like Brandywine. Some varieties are grown for cooking, sauces, paste, salads and sandwiches. Colors range from red to orange and yellow. Find your favorite and plant away.