EDIT: call me a psycho, but i think the idea of breaking someone down into dust with tiny explosions at a molecular level is an amazing idea. on second thought, that is pretty insane... still love it.
Sasori likes everlasting art because of his personality, Calm/stern.
Deidara likes fleeting art because of his personality, loud/abrasive.
There personality's mach there type of art. So if I went with my personality I would go with Sasori's art even though I like Deidara's art also.