Why do you have 6 of them?

Always seems like a good idea? I've got an iPad2 that I really wanted to love, and used until it became so slow it was useless (a couple of years ago). It still sits on my kitchen counter as a plugged-in weather station, though the app crashes frequently.

I've got an HP Touchpad I bought during the fire sale for $50 or whatever the going rate was. I think its got Android on it. It was less of a fun project than I expected. Mostly I realized I don't like Android.

I've got a 7" Fire I bought at christmas for $30 but never use.

My wife's got a 7" Nexus she got as a gift but rarely used.

She's also got a Kindle she used to use occasionally.

Plus an iPad Air she uses quite a bit.

I'm pretty sure there's another tablet or two in there somewhere but nothing comes to mind.

After the 2nd or 3rd tablet one would think "seems like a good idea" would have become "seems like a bad idea". You also didn't even mention why you stopped using the 3 other tablets you bought after having bad experiences with your iPad2 and HP Touchpad.

Your iPad2 example sounds like a software problem? And regarding slowness, have you tried a factory reset? I have an old iPod Class gen5(?) from 2004ish which became very usable after a system update (6 months ago) and a factory reset. I use it now mostly for streaming radio from various websites, all of which load fast enough.

Surfing the Internet, reading ebooks and watching videos are all things an iPad would do much better, particularly anything that would benefit from a hiDPI screen.

I do miss the high DPI screen when using my old Air, that's a good point. Though I usually don't feel my internet surfing is enhanced by holding a heavy tablet.

Have you considered the plethora of cases and stands available for relatively low prices? For someone with 6+ tablets, it just sounds like you buy them because they were cheap... and so that you have something to complain about.