There are about 400 different varieties, reflecting the fact that gardeners have very different tastes. Better Boy was named America's most popular tomato in a poll a number of years ago. My absolute favorite is First Lady. It has luscious, full-bodied taste and a perfect balance of sweet over tart. Glacier, hands down.
Glacier also sets fruit quickly on trusses close to the ground.
Fruits are plum size and have a full-bodied tomato taste, unlike most other early types. Unless you use some kind of protective covering, you shouldn't plant tomatoes outside until the danger of frost has passed. Keep this in mind when you are starting your seeds. They will add extra warmth during the day and keep some frost away from the tomatoes. But the best covering is what we call a KOZY-COAT which has plastic tubes you fill with water.