Welcome to the Forum!
One is that getting a cochlear implant could possibly destroy whatever residual hearing you may have in that ear. Although some sources have said that it'll be the case and others have said that it won't be.
As for myself, I got implanted in the worse ear. In the ear where I had less residual hearing to begin with, to the point that I wasn't even making a good use of an hearing aid in that ear.
Well, I've heard of some CI users still playing sports and so forth after they got one.
As for myself, I came into the conclusion that I probably wasn't going to be doing many of those things anyway (i.e. sky diving, bungee jumping, etc). You know there are also other, perhaps less active or strenuous ways of doing charity, grin.
That's okay. It wasn't that long to begin with by any standards.
You also mentioned that you also know of some deaf friends that has a CI. So, you may want to also ask for their personal input.
