Yes, I loathe making phone calls in front of people, especially at work. I hate open plan offices (which nearly all offices are these days) where everyone around you can hear your business calls. Even worse, for some reason, when it's a sort of scripted call, or you are making the same call to multiple clients, so the people around you can hear you spouting the same lines over and over. It is so unnatural to do, and people listening in makes it 10x worse. If I was in my own office I could relax and change the script around a bit, go with the flow more and definitely do a better job.
The worst thing: Your boss tells you to call someone about something then sits down right near you.