There are many many routes into the H2G2 universe, most of which gloriously contradict each other.
Which one brought you in?
I have always been into theoretical physics, although I'm not a physicists at all. I kept running into posts about the book on Reddit, while at the same time read George Gamow's 1 2 3 Infinity, so I checked it out one day and started cracking up from the beginning. It's very clever, starting with the improbability drive.
I do like the Infinite Improbability drive as a concept, it's so very..... neat in it's sillyness.
Honestly I watched the movie. I had to have surgery and was going to be off work for 2 or 3 weeks so I bought the book. I read all of it in a few days. I gave it to my son and he's read it a few times himself.
I know that people don't like the movie, but as a kid I loved it. Especially the bit about the whale and the petunia got me particularly interested in the whole thing.
Yes but that you won't get unless you read the book. The movie left a lot out but I still enjoyed it.
The books brought me in personally. My geography teacher in high school told us a story of a "cow that was genetically bread to want to be eaten" in a book he was reading. It sounded amusing so I picked up the first one from the school library and never looked back.
I picked up Dirk Gently's Holistic Detective Agency second-hand a few (or maybe a lot of) years ago and have been in love with Douglas Adams's writing style ever since.