I mainly just use PC computers. Mostly because that is what my parents got me. Macs are a lot more expensive. I have used Mac computers at school. When I'm on the web, which is most of what I do on a computer, they are the same to me. If you have special programs that only run on a Mac, that could be a reason to go with it, but these days almost everything runs on both.
I know some graphic designers that have to use Macs since they need very high resolution graphics that you can't get with a PC, but those are people that magnify things 1000's of times. For regular pictures and videos you can't tell the difference.