Is it normal for me to hate my older brother?

Rrg, this is insane. But I need to know.
Is it normal to really hate my brother? There are numerous reasons..

1) I am practical and he is not.
It took him THREE WEEKS to correctly full out ONE job application form. it then took him ANOTHER three weeks to correctly fill out his STUDENT FUNDING form. He leaves everything to the last minute and is constantly asking if strangers can come and live in our house. Oh, it's okay, they're /friends/ of his. They're still strangers who we have never met before!!

2) I'm curvy, and he is stick thin.
I am female and have a wide hourglass figure (measurements being, in inches, 41-36-45). He is completely stick thin and according to his BMI, anorexic and dangerously underweight. He eats like a horse and completely cleans out the fridge when he comes home! He eats more than I do. It's probably just to do with his metabolism but he lazes around just as much as I do.

3) I try to be polite and kind, he is blatantly arrogant.
He was a real dick to my boyfriend when he last visited (we have since broke up, but this was nothing to do with my brother) and made fun of my boyfriend because he is only slightly taller than me. When walking around a public attraction, he reads out all signs in a loud voice, always because he speaks before thinking. It drove both my and my boyfriend insane. Also, he often makes no attempt to be polite to (for example) shop assistants who are just doing their job.

4) Often he makes inappropriate remarks about peoples physical attributes.
As mentioned before, I am curvy and he is not; however, my mother, he and I were discussing members of the public who would be classed as 'grossly obese' and he made a cutting remark about my own size and weight. He seems to speak before thinking and this infuriates my father often, and my brother has been shouted at before now.

5)He doesn't seem to realize he does all these things!
He doesn't realize what he's like or how much of an ass he is. It's so annoying because I get angry at him (I am not known for patience) and he doesn't seem to know what he's done wrong.

He is very intelligent and has achieved good marks in university and college, but he has no sense of what he's like or how he behaves. It drives me insane and for the most part he is away from home, but when he is home, his behavior is terrible.
Sometimes I feel I hate him so much I wish I were an only child, or that someone else was my brother instead of him.
I worry about my own well-being, and if he has affected me in any way by not being a positive influence in my life. All he's done for me is show me what I don't want to become - lazy, mainly intoxicated, and arrogant.

is this normal, or am I weird?