I went ahead and bought a generic Android tablet, a couple years ago. At the time it was the cheapest tablet with a reasonable sized screen and minimal restrictions on what apps I could install.
I use mine for TalkBass, e-mail, calendar, and the New York Times. One of my relatives is quite happy with her Google Nexus 7.
I've been perfectly happy with it. I'm sure that I'd have been happy with an Apple too. It's also possible that the price difference between Apple and the Android tablets has narrowed.
I know lots of people with various kinds of smart phones and tables, including Apple. The most frequent comment that I hear is: "I love my iPhone (or iPad), but I hate iTunes." So, in the process of choosing a tablet, it's worth checking out not only the tablet, but also the PC and Web apps that you will be tethered to, because those things will also affect your user experience.
If you expect to use a tablet at your workplace, I suggest asking your colleagues about it. Connecting at work might or might not be possible depending on how your IT infrastructure is set up.
The cheapness was important to me. I expected to carry the thing around on my bike, and I simply wanted to minimize my risk exposure to the thing getting lost, stolen, or crushed. A minor issue was that I was interested at the time in developing apps, which so far hasn't materialized.