Android.

I used to play around alot with my girlfriends iPhone 4 but I didn't like it enough to get myself one.
Now we both have Android phones.

I like iOS and Android both, each has its pros and cons. Windows Phone seems to be another solid mobile OS, but I can't get warm to the tile look yet.

for now: Android smartphone and iOS tablet

Android,

because I don´t want to give Apple and Microsoft my money.

Windows Phone. It was the best handset I could buy at the time for the price, so I got it. While I love the OS itself and don't mind the lack of apps, the lack of support from Microsoft itself (I have a WP7 device) will probably make me never buy another Windows Phone again.

Android and didn't have a choice... iPhones are pretty expensive in here.

iOS on an iphone 5 :D

Main: HTC One (Android)
Tag-along: Nokia 620 (WP)

HTC One, it does anything I want it to do. Save anything I want. Hardware image stabilization in camera ala Nokia, but not as good. IR blaster, too lazy to find remotes or even change channels at peoples houses or public places . Sexy as hell. The hardware is powerful enough to run android smoothly.

Nokia 620. So simple and snappy. Easy to get to content I want and back to doing other things in life. Instead of navigating and opening up apps to see certain things. Camera button makes it easy to perv shot. I could have had a 920 or 1020 with better cameras, but they are too big. M$ runs so good on low end hardware.

Considering how M$ can make software that can run better with less specs, I'm not worried with their lower spec Xbox One compared to PS4. I have no doubt that if you put Android and WP OS on the same hardware. The WP OS will run laps around the Android.

Windows on Nokia 920.

Android, 4.2 on a Galaxy S4

Chosen because I hate touchscreen keyboards, but the Samsung swype text allows me to use the keyboard somewhat efficiently.

Same for me (except I didn't try a gf one, but friends ones). Although I like it, I wouldn't spend more than 150 euros for a phone, and my current Android one actually cost less than 90.
OTOH, when I had the opportunity to try a friend's iPad I was quite curious and interested, but the positive feelings ended very soon: the damn thing missed the input from my fingers far too often, sometimes I had to tap it really hard to click something or type a character (while it worked almost flawlessly in the hands of my friend and his wife)... Although It was already quite likely I wouldn't pay Apple prices for a tablet, after trying it that became a certainty.