Do a bit of research and talk to different breeders. Be careful what bloodline / family you buy, no matter what breed, as sometimes there is genetic problems with some lines and some lines can be "hotter" than others.
In our area there is both the older style angus and a more modern style, with the older style being more rounded in shape, and the newer, slightly more angular.
Some of the old style angus in our area are "hot" and can be quite aggressive, knocking over fences and not uncommonly charging. That has been tolerated with some breeders because in some areas they are thrown out on the range and usually don't see people until fall and they have to fight off wolves, bears etc to survive, and the ranchers don't want docil animals.
The other breeders have more of a pasture based management and have tried to breed that out, and their animals are much more calm and managable. So know what line you are going to buy, and maybe take a more experianced persom with you to pick out your animals.
Nite Hawk
The newer