I might surmise a few things here, one in the knowledge that you have been going to the same vet for quite a while.
There is a saying that "familiarity breeds contempt". I have been to most of the area vets and am now happy at the clinic I go to now. It's not "better", I don't like the vets any more or less, but I think I get the most service for the price. The people are casually friendly, but not overly so.
My second choice of a vet clinic has vets whom I've known for almost 25 years, and I've also known some of the staff that long. Some are people I went to high school with. I've known about their personal lives, and they probably know alot about mine. They aren't the friendliest people in the world, they don't smile, joke or even seem happy when there are customers standing in front of them. They don't ooh-aah over anyone's pets. The services at this clinic are significantly more expensive, probably to pay for the new building. I just always figure that the staff is not experiencing a good day, a good week, month, year... or a good life....They don't have to be nice because I know them and I understand.