Already had to dial the example back a bit. But the thing is the OP already knows why he's never satisfied with his purchase.
He doesn't know what he wants. He's purchasing things just because he LIKES new hardware. He buys a PAIR of laptops sometimes. He probably has more PC hardware purchased this year than I've purchased in my lifetime. It's just his hobby. The thing is he doesn't have the selfawareness to realize that's why he's purchasing things.
Other users are capable of realizing this (GPU forum has users who purchase GPUs just to try new GPUs and see firsthand how they perform).
Personally, I won't purchase something without a specific task to complete (HTPC usage, Gaming, Torrenting, Storage, Video Encoding, etc.), and if it won't fit that task ideally, I would never purchase it.
Tablets are a new thing to me. So I'm exploring the tablet space right now, seeing what they can do. I purchased an HP Stream 7 Win8.1 tablet with 1GB RAM and 32GB eMMC, and an IPS display. It's very nice, but the battery life could be better. (I think that the HP app running in the background drains the battery.) I also purchased a few Digiland quad-core MediaTek Cortex A7 Android tablets, with 512MB RAM and 8GB eMMC. I wasn't familiar with Android that much, so I didn't realize how much of a limitation that lack of RAM would have. I had bought three of them (two for presents), they were $50 ea. I returned the other two unopened, after using mine for a week. Then I saw the Iview 700-16G tablets on Newegg for $60. They had 2GB of RAM, and I thought that would be decent, even though they were dual-cores. I mistakenly assumed that they were Bay Trail, but it turns out that they were CloverTrail+. But they are far better than the Digiland. With 2GB of RAM, I can Skype while web-browsing, or open five tabs in Firefox. I couldn't do that with the only 512MB of RAM in the Digiland.
Then the big one, those $60 Winbook Win8.1 tablets from MC. Only 1GB and 16GB eMMC, but they had both a micro-USB charging port, and a USB2.0 host port, and a micro-HDMI! Finally, the possibility of using a small tablet, also as a desktop, was within reach and within budget. So I obtained a USB3.0 hub with a dedicated charging port, and a micro-HDMI to HDMI adapter, and connected it to my 24" HDTV. It performs decently, better than you would think for only having the 1GB of RAM, but what worries me is that my commit charge is higher than 1GB, which means that it is constantly paging out to the eMMC swapfile, and wearing it out. That's more my concern with these than performance.
Granted, my Q9300 desktop, when not running DC on all cores and GPU, is faster for web browsing than the tablet, but the tablet is not unbearable.
In fact, I use the Iview 2GB RAM Android tablet most of all, it seems. If only the Winbook TW700 tablet from MC had 2GB of RAM, then it would be 100% better, I think.
They do have a TW801 model, with 2GB RAM and 32GB eMMC, but for $140. More than twice the price, for twice the specs. Not worth it.