Pembo,
I've just returned from my surgery to remove my AN ten days ago, so I can't offer much post-op insight into your problem, but I can from the standpoint of a long time experience of poor hearing on one side. I think my AN has been around causing hearing trouble on one side for about 10 years. For years I've found myself purposely positioning myself with folks on the right side so I could hear. In a restaurant I put the good ear to the wall, so I can catch reflected sound from companion's voices off the wall (a bit of free sound reinforcement) and so I can help tune out the rest of the ambient chatter. Not a perfect solution but it helps.
Most of all, I found it very expedient to just plain let folks know when talking to me, that I only have one ear that works worth a hoot, and if they want me to hear them, they need to be on my good side. It doesn't bother me to let folks know up front my situation, and sure makes it easier to hear! Friends, family, and work associates that know me very well all know I'm a Right Ear Guy, and handle it well.
That said, since my surgery, I have no hearing whatsoever on the left side. I thought this might be an issue for me, but I've found it's just no big deal. Perhaps this is because the hearing on the left side was so bad for so long I just got used to it. Losing what was left wasn't far to go to total loss.
To a certain extent, I think it may be easier to hear more clearly now because I don't have the garbled input from the left cluttering up the good sound from the right.
Not sure if any of this helps or not. Perhaps for you too, time will ease the situation. When I'm tempted to start thinking Poor Me, I make a point to focus not on what I lost, but how lucky I am. I've been reading this forum and the old e-mail list since I was diagnosed last November, and much of what I read is heart rending, and makes me grateful that I came out as well as I did. With the exception of losing the rest of my hearing, I have zilch for side effects from the surgery. A few more weeks to get my stamina and energy back, and I'm headed back to the real world.
Zach