From my experience, I went from an airline MRO engineering position where I was responsible for landing gear. We were having issues with leaking seals. The company I reached out to offered a solution that I implemented successfully. I told other colleagues from other airlines about our success with the product which led to me being courted by the seal company. I worked there a little over 3 years. Allot of travel and self-induced stress (meeting quotas, sales numbers, customer visits, etc). It was very easy to get back into the aviation MRO industry as my experience was very desirable in that market. I had multiple offers on the table once I made the decision to look elsewhere outside of the sales realm.
Sales had it's perks, and I was successful, but it just wasn't for me.
I hope this helps you come to a decision and honestly, I would not have done a thing different. It's all part of the learning curve figuring out your career goals and aspirations.