Val Kilmer is well aware of those stories through the years painting him as difficult to work with. And on Wednesday, the actor said he regretted the behavior that got him that infamy. Participating in a Reddit Ask Me Anything session, the Top Gun and Tombstone star received a slew of questions about his illustrious career, and one of those was about him being called out by colleagues for his on-set demeanor. "I only cared about the acting and that didn't translate to caring about the film or all that money."