Why do you use Microsoft (or any company's) products?

Just as the title asks, why do you use Microsoft's products, and which Microsoft products do you use? I use a Surface and Lumia 928, and I primarily use the Microsoft ecosystem, while using a few Google services as well. I use the products because they fit my use case well, and the, hardware is actually really nice, as apposed to the Microsoft of yesteryear (although the poor hardware came mostly from OEMs). The Lumia and Surface hardware is phenomenal and I have come to find the hybrid form factor to be my preference. I use the services (Office, Xbox Music, bing apps, bing, Skydrive, Outlook etc.) because along with the fact that I love the new Metro/ Modern UI style, all of these services work very well for my needs and are integrated quite nicely with what I use. I like the fact that I can take a picture on my phone and it will be in Skydrive immediately after. Same with my Office files, which comes in handy. I use a Surface as my main device, because it offers a secure and hassle free experience with everything I need out of a computer, including free Office, RT also handles battery life quite well, which is something that I had desired more of on my Chromebook. Speaking of Chromebook, before I got my Surface, I used nothing but Google Docs/ Drive for my needs, and while I could probably easily survive with just that, I don't think I'll ever want to give up the benefits of Office again, so for as long as I don't have to pay for it, I'll be using it. So what do you use, and why do you use it?