Well obviously no one knows... or very few people know (I still think that there are a couple original bitcoiners on this forum who are 99% sure that they know who Satoshi is).
Whats your favourite theory?
Mine is that it was John Nash

Please provide some proof for your theories. Would love to look into them!
Nakamoto rarely discloses his true information. In his profile on the P2P foundation's website, he describes himself as a 37-year-old man who lives in Japan. This, however, is widely suspected. His English is as good as his mother tongue, but he never used Japanese. He searched online with his name and couldn't find any information about the person. There are signs that satoshi nakamoto (" nakamoto ") may be a fictional identity. This switch used in speech and programs in British English and American English, and randomly at different times throughout the day online, it shows he is intentionally or conceal their nationality and time zones, or account behind many manipulation. However, according to his analysis of his language habits and time statistics, some people think he may be an Englishman or an Irishman living in the middle or west of the United States.