OK. I officially dislike the Fire. The screen is just "meh", it's a little heavy for its size, it has a retarded custom UI and if there's an easier way to bring up the Android buttons OSD than turning the screen off and back on while reading an ebook with the Kindle software, I haven't found it. Many of the apps I want to install aren't available in Amazon's app store, or are available but are blocked for the Fire. Yes, I can side-load, but the stock experience is pretty lousy; I don't even particularly like the Kindle app for reading.
My ebook library is all .epub files, with a few .CBRs and PDFs that are either technical or Role Playing Game manuals that I selected specifically because they're obnoxious to read on a computer screen. It's not really a big deal to convert files with Calibre, but it does kind of annoy me that I would have to.
I suppose it's obvious, but having spent time with a 1280x800 screen, reading .PDFs and .CBRs on something lower resolution is a little bit hurty.
Other I people I know who have them, my mother and my ex, for example, are quite happy with their Kindle Fires, so I don't know if my complaints are justifiable or not. My ex in particular saw it as a big upgrade vs. her Kindle DX, which apparently has horrible issues with presentation of .PDF files. She's also an ipad owner. Her take-away between the two products is that the Kindle Fire exists almost entirely to serve as a gateway to Amazon's services; services she likes and already uses. In her view, the ipad is an expensive and not really much more functional device, just geared to Apple's services (which she doesn't use) instead and with a lot of "nickle and dime" functionality being locked away in Apple's App store.
Next week, I'll be reading on a 64GB ipad2 myself.