OMG, as a HUGE Bruce Willis fan, #1 is my favorite, simply because that was the moment when my crush was solidified, and NEVER went away! Up until then, I watched "Moonlighting" religiously, because I thought he was cute and funny. Die Hard just clinched the deal!
So, #1, #4 (cause I'm a geek, duh), #3 was good, and #2 was decent until I saw #3 🙂
(I have way too many Bruce movies in my collection...)