Are 6 Revision Rhinoplasty Surgeries Too Many?

There is no absolute maximum number of rhinoplasties that you can get as long as the skin is healthy.  If you are still unhappy after multiple rhinoplasties you must consider whether your goals are realistic
 

Most patients have absolutely no idea of how complex and technically difficult a major revision rhinoplasty can be; most surgeons avoid taking on the challenge of trying to fix another surgeon's work because they know that the results they can obtain will be less than perfect in most cases and because the skill set necessary to obtain a good result will be demanding. For a minor revision, which only requires a small correction for a  little irregularity here or there, the job is much easier. But from what you describe, you had a major revision that required cartilage and other tissue grafts. Taking tissue  from someplace else and putting it into the nose to try to recreate natural anatomy needs the experience and skill of a surgeon who does many revisions. If you have a significant improvement, can you be satisfied with that? Remember that there is no such thing as perfection in nose surgery; we all start out with some asymmetries prior to any surgery and surgeons cannot control the healing process.  It's not the number of surgeries that you have had that matters as much as what the current problem is, what has been done before, the condition of your nasal tissue and the skill of the surgeon. I once did the revision surgery on a patient who had 13 prior rhinoplasties done elsewhere and fixed her concerns with a 14th operation.

You have had a lot of surgery. Besides the risk of tissue death each time you operate you induce a new round of scar tissue which may alter the result. The chances of "hitting it just right" so the last little asymmetry that bothers you will be gone versus the chance of new problems keep getting worse for you. It's also possible that there are things you aren't noticing but after you have something else adjusted it becomes apparent to you. Ask yourself if your goals are realistic. Are they just about appearance, or did you expect different  things to happen in your life as a result of the surgery? Cliche's become that way for a reason and there's an old surgical one that goes "the enemy of good is better".