It’s very good at generating standards compliant, accessible websites that are easy to run. It’s worth spending time thinking carefully about exactly what you want it to do – as it can be tempting to keep adding on extra modules to benefit from extra features… and as with any modular system – things will start getting complicated if you add too many…

As to why you’ve seen so many Drupallers hosting in the States… I’m not sure why that would be. There are plenty of UK hosts who host Drupal. I would imagine its just that the big hosting companies offering good deals on Unix hosting are stateside..