I wont lie I've been blessed with a great career so far. I have been flying for 14 years now and have NEVER lost the love of flying. It still gets me excited to go to work. Honestly the worst part of work is the other people I fly with sometimes. A lot of jaded people out there in this industry and it's hard to tune then out sometimes. I've worked for 15 dollars and hour puddle jumping all the way up to majors, and quite honestly the best people I flew with were the ones making 15 an hour. But to answer the OPs question would i do it all over again? Absolutely! Best career out there in my opinion. Lots of family time, or time for a side business if that's your thing. However I wouldn't quit your day job, this industry can flip at any point. I would keep working as an engineer, keep flying as a hobby until you have all your certs and ratings and necessary hours. Then decide at that point if your ready to swap careers.