High tables used to mean one thing in most houses, a pub table pushed into a kitchen corner with stools too tall for anybody under six feet, and I spent a fair number of years thinking that was the whole category. It has gotten better. The good ones now sit at a height that actually suits how people eat and talk and linger, somewhere between a counter and a proper dining table, and they have stopped pretending to be bars.
A table at that height ages differently than a low one, because it takes elbows and glasses and the occasional foot propped on the rail in a way a standard table never has to. Wood tops show wear fastest at the edge nearest the stools, where sleeves drag across it for years, so a little dulling there is honest, not damage. Wipe up spills before they sit, oil a wood top once or twice a year if it is finished that way, and do not let anyone set a hot dish straight on it just because it feels sturdier than it is.
When you are looking at one in person, or standing over it the day it arrives, put your hand flat under the top and check that the apron and legs are actually joined to something solid, not just screwed into a thin lip of wood that will work loose inside a year. Pull a stool up to it before you decide, because a table can be the right height and still feel wrong if the stools do not tuck under far enough to sit close. Metal legs should feel like they have some weight to them, not the kind that walk across the floor every time you get up.
If this is your first one, go simple. A plain top, four straightforward legs, a height around forty two inches, nothing that is trying to also be a bar cart or a shelf unit. That version will sit well in almost any room that already has character to it, next to an old sideboard, under a pendant light hung low enough to matter, near a window where the morning light hits the top and shows you whether you kept it clean or not.
What it will not do is replace a proper dining table for a big family meal, or feel right in a room with low ceilings, where it tends to crowd the air above it instead of filling it. Know that going in and you will not be disappointed by it later.