That's a very broad category you've set there.
What you seem to have done is categorize preference in operating systems to just "stuff Apple makes" and "everyone else." Also, there doesn't seem to be any clear distinction between operating systems intended for desktops and laptops, and those intended for phones and handsets.
I know the general consensus in your school is that "Apple sucks," but you might've wanted to be a bit more specific here. Focus either on Desktop or Mobile devices when discussing Apple's OSes.
Also, on a side note, OS Wars were actually pretty common here on GBATemp a few years back. I kinda wonder why there aren't more replies to this thread.
That said, when it comes to mobile, I'd say I prefer Android. The OS is based off Linux, open-source, way more customizable with widgets, and has a more open app market, with alternatives like F-Droid being nice for those who prefer to steer clear of Google's own app store. That's not to disparage anyone who prefers iOS, though, which is more geared to casual ease of use than anything else. I'm just not an "ease of use" person.