It is all very individual, but I still see high quality leather types as the best option; preferably ones without waterproof liners. I happen to favour Altbergs but likely other brand's equivalents (like Meindel, Lowa, scarpa etc) are similarly good. They take some breaking in of course but once done they are a nice place for feet to be, and if looked after properly will go on and on until the uppers wear out; my current ones are on their third sole and will undoubtedly be fine for another unless I do something to cause damage.
I don't think I'm simply old fashioned, as I spent many years trying fabric types and liked some of them a lot (e.g. solomon 4d) but they never lasted as well, and in fact many couldn't (officially) be re-soled either, so seemed poor value by comparison. I'm still not sure the fabric gains much by way of compensation - except perhaps in summer boots with no membrane/liner to compromise the advantages.
Perhaps thats not an issue if money is no object but importantly I also struggled to get a good fit. Even where different widths are available, many models are more moulded, with partial arch shapes and so on built into the boot itself. Which in practice adds another aspect to not fit well (whilst also making customisation via alternative foot-beds more awkward) and which can vary between models or even updates of the same model.
But if you are lucky with the fit then probably much of this is meaningless, so again all very personal.