I'm a big greek myth fan when I was still a kid and actually thought at first that was the most influential myth in the world but when I got to see a lot of films, played more videogames and read more books, I got to say, Norse myth seemed more influential than Greek myth as some of its concepts were used heavily, say, films,videogames or literature. I'm guessing it's because it's darker and than most myths(I'm not really an expert on world myths so I can't say which is darker but I think Norse is darker than Greek)

I'd go Greek. Seems more prevelant then norse... and roman though different... came from greek,(and a little norse.)

Also, don't be surprised when people ruin the thread and take it into a waaaay oftopic religious warfare thread the moment someone votes other and says Christianity.

You just gave them the idea.

Why would that be off topic? Christian mythology should be eligible, just like any mythology. Don't think it's the most influential though.

I think Christianity, Islam and other religions are very influential but religion involves faith while mythology does not. So adding religions to the poll about myth is off-topic.

Nah, the idea was already there, some people basically seem to LIVE for this stuff.  (Like Sapphi on cue.)

this was an attempt at a brushfire so to speak.  Call out the stupiditity early, hope people read it and therefore are kinda embarresed into not doing or see it's been mentioned and therefore nobody will find it funny.

No, the ancient mythologies all were faith-based religions as well.

The difference is whether or not people still follow them. For all intents and purposes, Greek, Roman, and Norse mythologies are deceased religions. Islam, Buddhism, Judaism, Hinduism, Christianity, etc, all may have things as wild and fantastical as the deceased mythologies at times, but they're still widely practiced religions.

You seem to only be talking about popular culture, in which case Norse mythology is probably more influential. When considering ancient mythology or even modern day religions, though, I'd say that the ideology behind them and the significance of the moral lessons that they teach are far more important than the actual stories, characters and deities, which are hailed by popular culture. It's not, for example, supposed to be a fun story about a viking god who throws his eye in a well, but rather, you're supposed to see the significance of sacrificing important things to gain wisdom. Therefore, when you're considering influence, it would be best not to count the number of movies made on Greek gods, but rather to see what ideas that Greek mythology suggested that are still accepted today.
Not by any analysis or other scholarly means, but just by intuition, I'd probably say that Egyptian mythology would outrank most well-known mythologies as far as influence is concerned simply by predating them. That's because they all are very similar in more than one sense and the earliest religions probably influenced everything that followed anyhow.

Probably Greek.

Hindu Mythology for sure.

Although I don't really see it as mythology.