Umm, let's see, media-induced guy myths: these are much less complex than girl myths because, let's face it, guys are pretty simple. We don't like a lot of plot to our myths.
1. Myth 1:Women are sex-crazed adrenalin junkies who will invariably choose bikinis as zombie killing attire. This is the Lara Croft myth.
2. Myth 2: Women only have two personalities...gun-toting badass whore and mom. Occasionally both at the same time. the Sarah Connor myth.
3. Myth 3: the smoking hot girl down the hall was just waiting for the chance to dump her Ferrari driving wall street boyfriend as soon as the quiet but noble geek finally had the nerve to speak up. The Mary Jane Watson myth.
4. Myth 4: all women, no matter how bad-ass bikini-clad and gun-toting they are, will eventually need to be rescued by the scrawny nerd. (Side myth: all nerds have it in them to pull off a rescue when they really need to) This is the Princess Zelda myth.
See, basically guy myths are what we presume women are really like, best guess, because frankly we're fucking mystified most of the time.