The T-1000 is made of a liquid metal alloy. We see the T-1000 using its properties to mimic humans, including their clothes, which means its clothes are made of liquid metal.
Does this mean it's hard to the touch and cold, just like metal would be? I find this particularly interesting when it mimics John's foster mother. She has long curly hair and is wearing soft clothes that drape over naturally. If these are all made of metal that means the T-1000 is adjusting tiny strands of metal individually in order to appear as a realistic human. That's a phenomenally complex task.
However maybe I'm over thinking it, and in such cases it simply chooses to wear a wig and real clothes.
In addition, I did some quick calculations and worked out the T-1000 would weigh about 490 kg if it were made of steel. I don't think we have any stats about the density of the liquid metal alloy, but comparing it to steel seems like a fair assumption to me. Even if it were more like titanium that's still 280 kg.
So if the T-1000 isn't wearing shoes and what looks like shoes are just metal, it seems to me when it's walking or running it would be making loud clanking noises with each step, which would make its presence pretty obvious.
Am I missing something or is this just an oversight?