My first opinion of him seems to be from 2014.
I was on social networks like Facebook, Google+ and Twitter and I was mocking people like Stephen Hawking and Elon Musk for while being smart in their respective fields, ridiculous when it comes to Artificial Intelligence.
Now some people agreed with them but I think their fear was unjustified.
That was my first exposure to Elon Musk – a guy who was getting a ridiculous amount of government grant money (billions) to invest in electric cars and space stuff and thought AI was the biggest existential threat to humanity.
So, I never had a “oh Elon Musk cool guy” phase.