If WordPress is not typed using the proper casing and/or the WP abbreviation is used in marketing material then unless I know the person well, it gives a poor impression. I can forgive one or two mistakes because I know how easy it is to miss an error. But if there are more than that then I'll lose confidence in them from a hiring point of view because, in my eyes they come across as unprofessional or worse, as a slacker.

I don't like slackers and sloppiness. By not taking enough care, they've just shown me that they don't care about their own business as much as they ought to, therefore I'm not likely to get the best value from working with them.

I love people who are anal about the small details. It means I'll feel more confident working with them knowing they're not going to be sloppy, especially when it comes to my business.

It has nothing to do with not having anything better to do, or not having a life. I have better things to do than to keep having to go back to the person I hired asking for corrections because they couldn't be bothered to pay attention to the finer details. Heck, I've got better ways of spending my hard-earned cash.

Please note, I'm not referring to emails and casual communication.