By 1994, the public perception of the Hawaiian shirt had changed. Ace Ventura (Jim Carrey), like Magnum, is a detective, but where Tom Magnum pulled off a slick, cool vibe, Ace was a boisterous, obnoxious loud mouth. By the 90s, the Hawaiian shirt had become a hallmark of the kind of guy who thinks he's the life of the party, the guy prone to dancing on the bar or taking his shirt off unprompted, that guy that maybe next time you'll conveniently "forget" to invite out.
Ace Ventura, a guy full of jokes that only he finds funny and annoys every human he comes in contact with, is the paragon of the 90s Hawaiian shirt wearing dude. In the 90s, wearing a Hawaiian shirt was an easy way to tell the world, "Do not go in there!"