Brian ~
This is certainly an 'AN Issue'. Unfortunately, I don't have a pat answer to your very pertinent question regarding how you can change other people's expectations of you, post-op, when you're dealing with some serious physical deficits (hearing, balance). I suppose the rational answer is that, in the final analysis, you can't. People will see what they they want to see, believe what they want to believe and in your case (and that of many other AN post-op patients), your immediate family and friends will not see your deficits (because they're invisible) and thus, probably have expectations that are a bit unreasonable. That leads to their 'disappointment' with you when you don't 'snap back' from AN surgery and present yourself as the identical person you were pre-AN. That reaction is bound to be frustrating. Because of my age and so few post-op complications, I was spared this problem. My wife of almost 40 years has undergone many fairly serious surgeries herself (mostly for spinal issues) and has seen her ability to do some of the things she once did, diminished, although she refuses to give in to pain, and so, she thoroughly understands my 'new' deficits (hearing, balance) prompt me to forgo some things or simply not enjoy some of the things I once did.
I would submit that because we cannot control what others think about us when they don't understand that our 'new' AN-related deficits impede our enjoyment of certain activities we formally enjoyed or make some things difficult if not impossible, we have to chose to either simply absorb their 'disappointment' and realize it's based on what amounts to ignorance, try to explain the reality of unilateral hearing loss and diminished equilibrium (which they may not really appreciate, anyway, and consider it 'whining') or simply toss off any implied criticisms with "Hey, I had brain surgery!"
I realize this is a serious issue Brian and I wish I had some real wisdom to pass along but I suspect that, unless others try to be a bit more compassionate toward you and not see your changes in lifestyle as a huge negative but based on your physical reality, they will continue to shake their heads and consider you as somehow 'impaired'. Because you can't control that, you shouldn't become too concerned over it. It's frustrating that if you had a heart attack or a broken hip and recovered, your family and friends wouldn't assume you were exactly the same as before the incident and would likely make allowances for you when you couldn't do everything you once did or enjoy it in the same way. Not so with AN patients. Our tumor was invisible and so are our deficits. Deficits that impact our ability to do some things and/or enjoy them as we once could. You have my empathy and I hope you can find a way to deal with this unrealistic expectations from those close to you and, perhaps, educated them a bit, over time.
Jim