I'm not a devotee of any platform in particular- my last SIM free phones having been Symbian, WP6.5, iOS and finally ICS. I've still my first communicator in its box on a shelf at home- something to show the kids when they grow up.
As a student 15+ years ago- I really started getting into techie phones- the good old Nokia Game which I won some very nice prizes in, tweaked my interest, and was probably instrumental in decidedly pointing my future career in a different direction. Those little Nokia mobiles- they were innocent times!
Personally I couldn't make the jump from WP 6.5 to WP7- as the GUI just did my head in ( a bad experience with a Zune probably coloured my expectations). I nearly cried when I dropped my Ericsson P800 and had to choose a replacement as it wasn't manufactured any longer.
iOS- Lets put it this way- the phone didn't last a day without me jail breaking it- and after I discovered I'd have to buy an expensive array of adaptors to plug it into my PC and audio system, my first impressions of the iPhone soured. I was using a G4 Titanium at the time- and thought I was so suave having a matching phone. Luckily this was before I had to do any repairs on the G4- and had to send off for a special screw driver to open the damn thing.
ICS- as supplied on my htc One X- is also not without its failings. Why the hell is the default mode when you plug it into your computer 'Engineering Mode' so you can't just plug it in and drag and drop as a mass class storage device? Also- just what is the story with apps refusing to terminate when you close them- necessitating a reboot every day or two? Never had that with iOS. The big ray of light on the horizon- is of course alerts- even before Apple shot themselves in the foot with their crappy mapping software- the alerts in Android were just spectacular compared to their iOS comparisons. The ability to run my own apps, natively, and the abundance of free developer tools- well, its easier to sell it to me than it once was.......
Personally- I'd happily buy a Lumia (900 preferably) as a backup- purely on the basis of its camera and mapping utility. My Zune experience aside- I'm neither a devotee or a protagonist of any particular platform- I'm more interested in the hardware, and more pertinently the raw horsepower, than I am the OS it ships with- hence my HTC One X (I could have waited for the S3- but I actually preferred the specs of the One X).
Lets not be snobs about the operating system- and instead look at the hardware and how it compares to other hardware at a similar price point. I'm not going to pay a premium for a badge, I really don't give a crap, and I'm not going to pay a premium for a particular environment- though the idea of walled gardens, propreietory connections or weird configuration changes when making simple connections with other devices- doesn't bode well.
In the 800 and 900- we have first and foremost a phone, a remarkable camera, and a decent mapping system. The OS is the downside- but the hardware goodness more than makes up for that- and we're now at price points where they're pretty much giving the damn things away. As a backup phone- I can't see any good reason not to get one..........?