Okay, against my better judgment I'm taking the bait on this one - as it is a subject close to my heart.
I instruct. I also do charter (not as much as I'd like to, but the opportunity does arise on occasion). Either way, I'm flying. Whether I'm occupying the RH seat as an Instructor, or the LH seat on a charter flight, I'm still pilot in command of the airplane, and I don't see that one type of flying is any less important in my log book than the other. As such, I take exception to the attitude held by some that instructing doesn't count.
When instructing, you are working in a multi-crew environment, honing vital communication and interaction skills that you don't get in single pilot charter ops. If you happen to have multi-engine training approval and teach IFR, you are constantly dealing with engine-out scenarios and any number of simulated failures and other "what-if" scenarios that wouldn't normally occur in charter ops either. In my corner of the world, much of this flying is done in genuine IMC, rather than the 8 oktas of blue sky enjoyed for a good part of the year elsewhere. In short, I believe my instructing experience actually complements my charter experience, not works against it. So all I'm saying here is that diversity is the key. If you work for a company that is involved in flight training, but also has regular charter ops - you have the best of both worlds. Flying is flying. If we're all professional pilots here, instead of bagging our respective job descriptions, why not look for some good points that a diversity of flying experience brings instead.