I went round the house with a plug-in power meter and made a spreadsheet of our baseload. It's mostly computers: About 150W total of server, router, modem, switches, cooling fans, Ethernet-powered phones and deaf alerters. Another 12W for the fire alarm, and about the same in network-controlled LED lighting, and again in scrolly LED signs.
No TV or anything, but a couple of hundred watts for our desktops+monitors etc when they're on.
The other big one is the fridge, which is about 100W. Duty cycle varies according to what's in it, of course. Boiler is about the same.
I didn't find any unexpectedly high loads, even the shitty microwave only uses about 2 Watts. I did find that the apparent power of the downstairs Ethernet switch and PoE injector PSU adds up to less than the sum of their individual loads...