I personally don't... but my Uncle has it, My Grandfather did, and a few of my friends from school have it... All 3 i don't know which type..
My Uncle, he doesn't really seem to care... he eats everything, we're very Italian and he eats basically only Pasta, which is all Carbs and turn sinto sugar, but he doens't want to believe my mom (his sister) and my uncles (his brothers).. but he seems to do what he wants... it isn't good for him..
My Grandfather... he died of cancer (i miss him dearly, was in 4th grade when he left... r.i.p

).
My friends from school, don't know what they have... But one doesn't really take care of it, i've seen him have a few attacks... and they are VERY VERY scary...
My other friend has this little thing that atuomatically pumps insulin into her pancreas, so she's fine...
but whatever you do, take care of it. it is not a good idea to think it isn't a big deal.. and learn what you should eat and not to...