on my mum's pc, vista home basic 32, it's 8.80gb, insane size imo
ms should seriously have the option during install to not install certain features / components and enable you to install them at a later date using the windows disc -like you could with Windows 98
'the more the merrier' is not the case
on my laptop, the whole C drive is about 2.4 gb, that's including a 1gb pagefile and 1gb hibernation file, xp home lite