1. HK MP5 because of Die Hard (1988).
Unfortunately, the 1989 executive action import ban on "assault weapons" put the HK-94 out of reach.
With PTR now making an MP5 clone in the USA, I'm tempted -- even though I have a SIG MPX and the CZ EVO Scorpion is the current internet hotness -- simply because of 1980s nostalgia.
2. HK P30L, because of John Wick (2014).
I was already looking at the P30 because (1) a friend of mine had bought one a few years earlier, and (2) it was the then hotness here on Pistol-Forum and Pistol-Training. But after seeing John Wick, I wanted the L version.
I did get a P30LS in a trade a few months later, but ended up eventually trading it for something else. As much as I like the idea of the P30 and P30L, I'm one of those people whose trigger finger gets rubbed raw by it. I'm sure it won't stop me from getting a non-S P30L if I find one at the right price, because of John Wick.
3. I would say that if they ever make an action movie about, based on, or starring Ernest Langdon, I'd want a Beretta PX4 Compact. But I just picked one up this weekend. Since it was because of Mr. Langdon's "The PX4 Compact might be my DA/SA Glock 19" thread here, I suppose that sort-of-counts.
I'm sure there are others I can't think of right now; probably more than I care to admit. If/when I get around to sweeping the cobwebs in my head, I'll post them here.