Kindle DX
I LOVE my Kindle DX. I like to read a lot: books, random articles, academic papers, whatever. I also spend a lot of time staring at LCD screens, so reading from e-ink is a welcome relief. If I find a long article on the internet I want to read, I often copy it into a text file and put it on my Kindle just because it is so much more comfortable to read there. I also read a lot of academic papers and PDFs, so having the large screen is really helpful. It's my favorite gadget.
Nexus 7
I LOVE my Nexus 7. The 7" size is super convenient, Nvidia's Tegra 3 processor and Jelly Bean makes it super smooth, games run great on it, it has great build quality and a great screen. It's by far the best 7" tablet out now, and in my opinion, the best Android tablet as well. Far better than the Kindle Fire or the Nook, and cheaper than anything else, and the best bang for the buck tablet available anywhere. I was surprised at how much better the video call quality was from my HTC One S, and the One S really should be just as good as the Galaxy S III or any other phone out there. The speakers on the Nexus 7 are way better, the microphone is way better, the front-facing camera is way better, and the processor is significantly better. I don't mind not having a rear camera because my phone has a very nice rear camera already. Most of all, I love having the latest and greatest version of Android, and knowing that when the next version of Android comes out, I'll be the first to have it. Google takes care of its Nexus line. It's a tablet that will be awesome for years to come.
HTC One S
I like my HTC One S. It's very slim, nice-looking, pretty fast, and has a great camera. It runs Android 4.0, and HTC is pretty good about updating their phones' software. But it's had some weird problems with wifi calling and skype, and I don't like Sense, HTC's custom skin for Android. It has the best rear-facing camera out on a phone today (other than Nokia's Pureview 808), but it's still nowhere close to the quality of even the cheapest DSLRs (which is true of any phone's camera). It's the perfect phone for someone who loves taking pictures and videos with their phone, and even though I'd rather have vanilla Android or Windows Phone, it's one of my favorite gadgets.