As an electrical engineer, Tesla's have always fascinated me, and I believe that the model 3 is the best $35k-$45k sedan that one can buy.

However (and this is just my opinion), it sounds like you have a fascinating career as an Aerospace Engineer - you are still young. 

Mainly, the systems implemented are fascinating. 

Real estate in general is really fascinating to me, so it's fun to research and put time in to learn about other markets.

The film Gringo: The Dangerous Life of John McAfee gives some good insight into how ineffective the Belizean police are at solving crimes (plus it's a fascinating flick): https://www.imdb.com/title/tt6...and this article is perhaps a little too heavy on the fear-mongering side but makes some valid points that support what I'm trying to say:https://abc7chicago.com/news/d...  

REI is fascinating, and also most of the time with a lot of risks, sometimes for those experienced, but more for inexperienced with cash to invest, and more often with very limited individuals with cash or credit.  

One fascinating example from The Big Short is this Mexican immigrant strawberry farmer living in California that was able to get a mortgage on a $750,000 house based on a stated income of around $15,000 annually.  

It was fascinating.

One thing that's fascinating is that the whole classification thing is 'in the eye of the beholder', as the disagreements show, especially in the middle rankings.

But I have always been fascinated by the real estate industry.