1. Apple's iOS compares quite well, but if you want to maximize stability be cautious about updates until there are some reports (some of the 7.x and 8.x releases were clunkers, though the current 8.3 seems quite good now), and turn off features you don't need, especially the privacy-invading ones.
2. Blackberry. They're still around, and they're rather solid -- provided the device is. (Some of their devices have been clunkers, others solid. Again, take a look at consensus reports.)
3. Nokia/Microsoft S40 devices. You can still find some S40 devices (unlocked and inexpensive), though they are not as feature rich and stretch the definition of "smartphone" downward. I've got an S40 device that, at least once updated to the latest S40 release, is rock solid -- and lasts a long, long time per battery charge. The S40 devices are not long for the world, though, so don't get too attached.
4. If you experiment with Android, I'd stick to the purest form of it: Google's Nexus devices. If Google cannot make Android work well on its own branded devices then nobody can.
Let's suppose you have two children and your U.S. Adjusted Gross Income (AGI) is about $75,000 or less. (If you earn more the math *might* change.) When you file your U.S. tax return (filing status Single, or Head of Household if you qualify), as a resident of Belgium (a comparatively high income tax jurisdiction) you should NOT take the Foreign Earned Income Exclusion or Foreign Housing Exclusion (IRS Form 2555). Instead you should only take the Foreign Tax Credit (IRS Form 1116). You should also take the Additional Child Tax Credit (IRS Schedule 8812). Follow that particular path, preferably using your favorite tax preparation software (even the free ones like TaxAct or TaxSlayer), and you should see a REFUND at the bottom of your tax return. Yes, the IRS will send you $1000 per U.S. citizen child per year in free money. Really. (In tax years 2009 and 2010 there was another $400 in free money available as a special refundable tax credit, but maybe you missed that.)
Take the money and save it for your kids, or spend it on your kids, or some of both. That's about $17,000 per child in free money over their childhoods. When they turn 18, THEY can decide whether they wish to terminate their U.S. citizenships or not. I'd advise them not (under present conditions at least), but under current law it's free to do so before age 18 1/2. Even if it's not free, they've started with $17,000 in free money plus interest.
No brainer, here: get your kids' U.S. citizenships documented. U.S. citizenship literally pays.
Heathrow is restricted airspace. NOTHING should be in that area, it's the world's busiest airport.
Though I absolutely agree nothing else should be in the controlled airspace around Heathrow (or any other controlled airspace) without the full knowledge, permission, and constant monitoring of air traffic controllers, Heathrow is not the world's busiest. Heathrow serves the largest number of international airline passengers annually. Atlanta's Hartsfield-Jackson International Airport is the world's busiest both in terms of passengers served and aircraft movements.
Internet Explorer 8 was the last Internet Explorer available for Windows XP. Was Microsoft tempted to ignore the security exposure until XP fell out of support? Are there other security vulnerabilities in Windows XP reported before April, 2014, that Microsoft has ignored? Will Microsoft ignore (or at least slow walk) reported security vulnerabilities in their other products as they get nearer (but not actually reach) their end of support dates?
These continuing security defects are really beyond ridiculous. Maybe regulators -- the European Commission? -- ought to be mandating that vendors fix security vulnerabilities in their products within, say, 120 days. That would extend to all products sold (refurbished, new, whatever) within the past, say, 7 years. Otherwise, the vendor will be automatically barred from selling anything unless and until their security messes are cleaned up.
To thine own self be true. (If not that, at least make some money.)