Cymbals are the "accents" of the orchestra. They are meant to add to the sound by using a variety of techniques. You can "crash", roll, scrape, tap, and many other things to enhance the sound of the group.

Many late 19th- and 20th-century composers have made considerable demands on cymbals (and the player). Most professional orchestras have developed an ‘armoury’ of cymbals, both in pairs and suspended, from which to choose. (grooves music dictionary)