While I can write about laptops owned by others my laptops either owned by me or supplied by the office are dull as to the stories.
I'd had Dells, Acers and HP/Compaqs. Keep in mind that they were never dropped, kicked, sat on, spilled on, modified until they were years old and never did we blame a Windows issue on the maker.
I'm also an electronics designer and clean the heatsinks, vents yearly.
It's quite exciting to be able to work on other people's laptops since it gives me a glimpse into what goes wrong. Outside of those (terror) Pentium 4 based laptops (which I've written many times "don't buy") I can't say I see many hardware quality issues. Too often it's just a failed OS issue or in 3 and up year old machines hard disks and batteries.
Other hardware failures I see are the power plug and battery charging circuits. People tend to try to "save" a dead battery then fry the circuits or travel with the power plug in the laptop.
When your looking for a new laptop what is more important to you? 1. Getting a good quality laptop from the start and less likely to break or 2. A laptop more likely to need a repair but the brand has a excellent support record? I've had 5 laptops in my life and only 1 has needed to have warranty work. I've had a hard drive go bad but that was replaceable with buy a cheap one online. I've never had a battery go bad or a screen go bad.