Hi, Greg ~
Welcome - and thanks for posting.
My view on tinnitus is that it will not disappear after surgery and while it could intensify, it will likely remain about the same. Mine did. Fortunately, I have fairly 'low level' tinnitus so it isn't a big problem, just a minor annoyance.
A 'ballpark' figure on post-surgical complications would probably be in the 20% range, although others may differ with that figure. and, I admit, it's just a guess based on the thousands of posts I've read on these forums over the past four years I've been a member. Many post-op issues tend to be temporary, although with some, 'temporary' is a relative term. We've read about post-op AN patients with facial paralysis that report movement 3 years later. As always, the surgeon's skill and experience along with some luck (and, in my case, much prayer) are all factors and frankly, some things simply are going to be unknown until the surgeon actually makes the incision and can see the tumor. Mine was bigger than originally diagnosed, about 5 cm., but I suffered no post-op complications to speak of and my experience is somewhat common.
As for information overload; yes, that has the potential to be a problem. You have to have perspective and understand that the folks with complications are seeking advice and some comfort so you'll see lots of those kinds of stories, here and elsewhere. We're a support-oriented AN site so we welcome those posts and want to help those AN patients in whatever way we can. However, to a 'newbie' (newly diagnosed AN patient) contemplating surgery, they can be daunting. I'm happy to report that on these forms, we have lots of AN patients with good outcomes (like me) and even those that may be struggling usually have a positive attitude. Of course, we can understand when a poster is facing all kinds of problems, post-op, and slips into periods of bitterness and/or frustration. I probably would, too. Still, we try to be positive but realistic, as I've been with my answers to your questions. I trust you'll come away from this thread satisfied (to some extent). Above all, please know that we'll support you all through your AN journey. Don't hesitate to ask anything. We may not be doctors and no one has all the answers but we try - and we care.
Jim