Tomatoes adore being dried, they just must. It would have been too clumsy of an evolutionary path for them to be so exceedingly delicious when dried if it didn't serve their species in some way.
But wacky biological imperative theories aside...
Expensive sun-dried tomatoes imported from Italy made a big splash on the culinary scene in the early 80s, but expensive sun-dried tomatoes from Italy are...expensive and from Italy, which means not the best choice for many of us. But that's okay, because tomato season is here and we can make our own! Little expense and no Italy required.
See What to Do With a Glut of Cherry Tomatoes for the how-to.