heres a few from me:
why build houses right next to each other, with windows that look in on each other? Ever frickin heard of PRIVACY? Offsetting windows an alien concept? Curtains too aparently......
why paint every single wall in a house the same hideous shade of mint green or surgical appliance pink? Then add furniture in burnt umber.......nice.
why use nasty flourescent lighting that burns the retinas out of eyes?
why leave wiring exposed and badly painted over rather than channel it through the wall?
why have those ugly frikin fuse boxes exposed? Why not just cover them over? Too much work is it? (see also wiring above)
why still use those stupid hasps on external doors that require a padlock to secure them? Why not just stick a big neon sign outside the house saying "Hey Mr Burglar....look....Im not in!!!"
In a country where it rains every day for 6 months a year, why cover the driveway in shiny tiles that turn into slidy slippery glass when wet?
why rent a house out that has locks on most doors, but no keys to open them when by accident they slam shut and engage the snap lock?
and my personal frickin thai fave
when you live in fairly cramped houses with sod all space between them, why have a cinema surround system louder than The Who's onstage speaker system, spend all afternoon watching muay thai and all evening watching soap operas at ear blistering volume, and then get up at 7am and start singing off key shitty thai karaoke through it?
do I need to explain why?
TIT
most of these I just shrug and laugh at....
the last one is a bugbear.

"Science flew men to the moon. Religion flew men into buildings."
"To sin by silence makes cowards of men."