I have been flying jets for the last 8 years, previously a flight instructor, and personally I think it is a lot of fun. I dont think I have ever been bored. I still very much enjoy the job.
Every day is different, different issues and challenges to deal with, different crew, and a varied network. I have done numerous non flying related jobs in my life and being a professional pilot certainly makes me appreciate what I have and am thankful for the opportunities I have been given.
All the best