nah since I was kid, loved science and mythology. All the mythologies, except norse, have global flood, you could include norse as ice age, though, cow licking existence into being.
I'm not sure why other cultures would have a global flood story in the first place, since they all perished in the Flood.
If they had one at all, it would have to have come from word of mouth, and given the fact that the stories differ so much in detail (names, places, who was on the ark, the ark itself, etc.), I can only assume they made these stories up to make fun of what really happened.
Shem, who lived right up to the time of Jacob, was always around to set the story straight.
Some time ago, I made up this little conversation to exemplify my point:
Shem: What's this trash you wrote, Nimrod; are you okay!?
Nimrod: Don't start on me again, uncle; you've always looked down on us Hamites.
Shem: That's garbage too! You used to be a mighty hunter before the LORD, what went wrong?
Nimrod: You think you Shemites are so much better than us, just because my grandfather was cursed for what his father did to your mother in that tent that day.
Shem: I watched you grow up, Nimrod, and how you used to love the LORD so much; but somewhere along the line you went astray and broke away from the rest of us and went and formed your own little empire. Well ... you do what you want, but as long as I live, I'll make sure my eyewitness testimony trumps your lies.
Nimrod: And what makes you an authority on the Flood over me?
Shem: I was there! Remember??? I was on the Ark ... you weren't!
Nimrod: Oh, that's right ... somehow I forgot ... what with there being no evidence and all.
Shem: [facepalms]