The benefits of tinnitus?
Hmmm... let me see... oh yes, I have become an awful lot more knowledgeable on certain areas of medicine such as audiology, ototoxicity, potassium modulators, stem cells, and many, many more topics - which - I for sure had never anticipated or ever planned on.
I am also not afraid of dying - and even had the "opportunity" to test that fact in real life. Not sure, if that counts as a "benefit", however.
Additionally, I have learnt not to worry about unimportant matters; essentially, anything except "my house is on fire" falls into the "I don't care"-folder.
The last benefit is more of a projective one: if I were to become 100% cured, I would wake up - every day - feeling as if I had won the lottery. How about that...!