I'm still instructing. I've been instructing part time for 3 years while finishing my Bachelor's and Master's degrees. Sure, I may not be flying a shinny new jet, but the flexibility of instructing allows me to work on my Master's full time. I enjoy teaching, I've become a better pilot b/c of it, and the quality of life is great. Not to mention, a 2-yr CFI is a valuable asset to flight schools these days.

Having a dream to fly for a major is good, but don't be so consumed with where you're going that you're not experiencing fulfillment where you're at. Don't miss the forest for the trees. There's plenty to learn and enjoy with every flying job. It's all about attitude and perspective.