I find that sales/business people are far more likely to add the "Hi, luke" while more technically oriented people, and friends are more likely to just get d

I find that sales/business people are far more likely to add the "Hi, luke" while more technically oriented people, and friends are more likely to just get down to the message, so in my mind, the salutation makes the letter seem more businesslike and formal. It's a style thing, and it's really not that big of a deal either way, if you ask me. I just find it interesting that our perceptions of "businesslike" are opposite.