Everything: '93 Leatherneck
As a fan of Dinosaurs and things like Jurassic Park, I really, really like the concept of a Joe Dino Hunters team. Cobra has found a way to clone these prehistoric beasts with plans on letting them loose on the world and its up to a specially trained, specially armed team to hunt them down!
Giraffe pants aside, I really like the '93 Leatherneck toy. That figure meant he had a more prominent role in my own little Joe play world. I always thought he'd be a great fit for the Dino-hunters, and was one of the first figures selected.