Obsessive, compulsive.

Do I have Obsessive Compulsive Disorder?

It really bothers me when people write the initials of something but forget to put the last '.'

For example: T.N.T <-- see the bit that is missing? IT KILLS ME! it should be T.N.T.

haha, I'm sure I make loads of silly mistakes myself, but when I notice them on other people, it actually drives me insane.

Another thing that I can't handle is when people spell 'you're' wrong.
If you are using it as a shortened version of 'you are', for example, you're very tall, then it should be 'you're'.
If you are using it to refer to something that belongs to someone, for example, this is your pen, then it should be 'your'.

!!

ANDDDDDDDDDDDDDD...... I dislike how people think that the words 'of' and 'course' merge to make one word; ofcourse.

It is just not right. And it tears me up inside. Amen.