I've settled - for now - on using Mint Linux Cinnamon distro at home as my main OS of choice. Reasons: basically it seems solid, works quickly (and everything works - networking, printer, NAS etc etc) and is easy to use. On Sunday morning I came to print some music for the first time since installing and the printer was not yet set up, so I went to the printer control, clicked 'Add', it showed me our samsung ML1210 was connected. When I selected it the software downloaded the appropriate driver and 30sec later I could (and did) print. It feels like the bad old days of hunting for drivers, HPLIP and CUPS profiles is long gone.
Elementary Linux has been installed on that 250Gb 'testing' drive for more experimental use. Plus I still have my windows drive attached for when I can be bothered to call microsoft and re-activate it with the new hardware, though there's less and less chance of me doing so right now with this Dell Laptop available for editing images at home.
In my last Linux post I mentioned KaOS Linux. This looked really good at first try, but networking seemed difficult, with a refusal to recognise any devices on the network. I know that's not a characteristic of KDE, because openSUSE was fine. There were a couple of other oddities that made me decide in the end not to follow it any further. I might well bung openSUSE 13.1 on the testing drive too in order to have access to the different tools available in KDE, though logic tells me that I should just install equivalents into Cinnamon & work entirely from there. I don't know why, but I *prefer* the KDE desktop, even though it sometimes behaves a little oddly and is very resource-heavy.
Once again, if anyone is thinking about trying Linux then I'd definitely recommend giving Mint (either Mate or Cinnamon) a go - everything works out of the box, or for things like printers, can be added with minimal effort.