Yeah, dude has done some not-so great work, okay maybe he's done a good amount of not-so good work. But dude has done some good quality movies.
Bull Durham
Field Of Dreams
The Big Chill (okay, he's in five minutes, but still...)
No Way Out

there's a few good Costner flicks out there.

"Your current frequencies of understanding outweigh that which has been given for you to understand." Saul Williams