I'm not. As good as I am with Windows, Macs are Greek to me. I haven't had to regularly use one since elementary school, and in college, I couldn't even get a PowerPoint started on one. I've grown up with Windows, so even though Microsoft screws up sometimes, it's what I'm used to. Plus, I'm so familiar with Windows that I've got it utilized fully. Got OneDrive, which syncs my files in between my laptop and Surface, and I can login on a school computer to retrieve files. No flash drives. My Surface is wonderful for taking notes since you can write with a pen. And for signing documents; I can sign them before I even print them. Macs just confuse me. If I sat down with one, I could probably figure it out, but there's a fine line between "I could" and "I actually want to..."
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That, and I just think Macs are overpriced. I can get a Windows computer of similar quality for a WHOLE lot less. I think Apple is a good company that makes good products, but I personally have no desire to use any of them.