Probably 10 - 15 over the course of 20-odd years.

Sizes from a 10" ASUS eeePC to a Toshiba 17" monster desktop replacement, generic brands, a 14" Lenovo Thinkpad, a 13.3" Dell XPS, Samsung (real puurty silver slimline thing I was sad to say goodbye to), current work laptop is an HP Elitebook, a 15" ASUS, a 13.3" ASUS, and at least a couple of other work ones that aren't memorable enough. Plus my kids' school chromebooks.

No macs though, I've not crossed that border yet.

I can deal with any keyboard, but for actual proper typing in an environment where one is meant to be working, gotta be an external keyboard. I've got a mechanical at home, but I'm fine with non-mechanical at work, so I don't think I'm too much of a prima donna - I won't say that's inarguable fact though ;)

I know the thread has drifted a bit here, but in the context of employment, I don't have the option to try different laptops. I've never worked at an employer that permitted BYOD for the laptop, and so you're stuck with what they issue, which is generally a single choice, as they don't want to put in the IT work to support more than that.

If that choice is a MBP … then you're stuck with not only an infamous keyboard, but also one that causes me (and many people I've worked with) RSI … it's that, or an external.