A tablet can be a very bitter pill to swallow if it's a bad device. Ages ago, I bought a tablet to display my photographs. It only kinda-sorta worked. It was a Nook Color and as at the time I was working at a store that sold them I was able to pick up the very last certified pre-owned model for about $90, the night before they were withdrawn.
While I had been at the store that sold Nooks, I had a lot of Nook returns but usually it was just because people didn't understand how to use them. Other than that, there were battery issues, charging issues and wifi issues though those were in the minority. I recall a customer coming in and complaining that it would start turning pages randomly after a while but it never did in the shop so I discounted that as a fault. Now the thing about the shop was that it was humidity controlled. When I got my Nook Color home is when I found out that it really misbehaved in humidity. I could not use it in my bedroom as I would likely be breathing on it and then it would go berserk, acting on phantom touches or going completely screen dead. Thus I resolved to using it for other things.
One day I took the thing to show photos to some people that didn't really matter much. It was a talking point and that was all. At the start of the meeting it was fine then as the room got more humid, it began to act up by which time people were asking to see it. Needless to say it embarrassed me considerably. A professional trying to show off things and his equipment malfunctioning. It just made me look incompetent and I was getting remarks like "shouldn't have wasted your money on that. Should have bought an iPad".
Aside from the fact that I could not comfortably have afforded an iPad, I did look at an iPad mini which I could have had for $260 but decided to spend $90 on the Nook instead. What a bad decision that was. Indeed, my friend told me that she didn't see why I bought a Nook when I was eventually going to have to buy the iPad she knew I wanted in the first place. It's true - I should have bought the iPad - even if it was the mini and not the full size model.
In the end I put the tablet up for sale on eBay and was rather disappointed to get $30 for it. The previous week they had all been selling used for $75 - $100. I had hardly any bidders. This is generally my experience of anything I put up for sale online - hardly anybody is interested. It cannot be the description because I simply copy the description like everybody else does.
At the moment I have a Nexus 4 phone which means I can display photos on the fly. Since I now no longer have a pressing need to display a portfolio since I now no longer try to operate a business, I can't say that I have any particular use for a tablet.