IMHO, brand loyalty is something based on a perceived quality, rather than just a preference. Mostly applicable to major manufactured goods. It can also apply to retailers, as between one that is a deep discounter of crap, and a retailer of quality stuff. For example, I like Coke, and think Pepsi is disgusting, but that isn't "brand loyalty". It is just a taste preference.
As to cars, I stick to so-called "foreign" cars (companies that started in other places and now make cars worldwide, including in the USA) over so-called "American" cars (companies that started in Michigan and now make cars worldwide, including communist China, Vietnam, etc). Fool me once, shame on you; fool me twice, shame on me. "Asian" and "European" brands are just massively higher in quality.
Phones? Apple. Mostly just because I know how it works and don't need to learn something new.
Clothes. Duluth Trading. Excellent stuff, lasts forever. LL Bean for dressier stuff. Brooks Brothers for suits and office wear, never goes out of style.
TV. Sony. Never had a bad one.
TV service. DirecTV. Works properly, full of CONTENT, not trying to save a nickel. If I wanted less, I would just watch Pluto and STIRR.
Retailers. Kroger. Menard's.
Consumer products. Tide. Crest. Scope. Pretty much whatever P&G makes.
Airlines. American. But mostly because I am at the spoke end of the "hub and spoke" system, and prefer the American hub (CLT) to the Delta (ATL) and United (ORD) ones.
Hotels. The Hilton family. You know what you are getting. No surprises.