DISCLAIMER: I am not a lawyer, social worker, judge, psycologist, doctor, or ATF agent...nor to I aspire to become one. My advise is worth what you paid for it.
Jamesmb: After reading thru all of the posts (mostly the last one), I would think that you would qualify to own a firearm. You have never been "adjudicated mentally defective " or deemed to be "incompetent to manage your own affairs."
If you honestly do not think you will be a danger to yourself, or others, I don't see any reason why you shouldn't have the same rights as the rest of us. In fact, since you had your "guts removed surgically" and are wearing an ostomy bag, you may have a need for a gun more than most of the people here. Criminals may see this as a sign of weakness, making you an "easier target" (this is not to say that you are not very capable of defending yourself, but in the eyes of a criminal this might make you appear weaker, and as such, easier prey).
I would say that you need to ask your chief law enforcement officer, lawyer, or someone else who could render a better decision then those of us on a gun board. I say go for it. The worst that can happen is that you will be told that you do not qualify...no harm no foul. If it is deemed that you can buy a firearm, you can enjoy the sport along with the rest of us...and potentionally save your life in the event of a violent attack.
I personally believe that everyone who is not a violent criminal or a danger to themselves/everyone around them should be able to bear arms. The constitution was written just as much for you and it was me. When those great americans wrote up the constitution, I doubt they intended the bill of rights to only blanket "most" americans.
Good luck jamesmb. Hope that you find the answers you are searching for. If you live in or around Nebraska I would be happy to take you shooting sometime if you get the green light to proceed with your purchase.