I know that to some people it is not politically correct to say you are a disease. Instead, they prefer you say you are a person with a disease. As far as that goes, I still say I AM Bipolar.
I'm not really a disease, but I am also NOT politically correct, as I was raised in the era before political correctness came into being. And with a schizophrenic older sister to boot. So I've grown up using terms like nuthouse, looney bin, crazy, and many more terms other mentally ill people might find offensive. I'm ill, and I'm not offended...But I do try to reign it in and be more pc, as I used to get hell from the psych staff for referring to myself as "the bipolar in (room) 304". Also, we have many newly diagnosed people here, and they deserve a little more delicacy than I usually show.
So I guess it all boils down to this. Do you really care if you are politically correct? If you do, then you have Bipolar. If you don't, then just be yourself, don't worry about what others think, and be bipolar.