I would like to be more loyal to a particular brand but there never has been a brand to which I could go for most of my clothing choices. I guess that would be different if all of my clothing would be custom made and money wasn't an issue.
Brands (imo) are trying to do that (provide cust w/all their clothing needs - promote a lifestyle rather than brand) but it doesn't seem to work completely. I think it could be done but in a different way than most companies do it today.
For me, I am (and believe most are) loyal to a particular article of clothing from a brand, not everything from a brand.
If someone asks me for my favorite brands, I don't wear all of the clothing from the brands I mention. I might not even have any clothing from my favorite brands. I might just like their style and I am trying to express my style to someone else.
Not that anyone ever asks...