The first brands and companies that come to mind: Lexus sedans & service.. Delta Airlines. Hilton Hotels. Asics running shoes. Great Lakes Brewing Company. Cole Haan casual shoes. Amazon Tanqueray Gin.
Wikipedia - donated several times Apple - since 1989 (the early 1990's were very trying though) Costco - terrific store Dollarama (Canadian dollar store, nothing like it in the USA) and most devoted to Second Half - since 1998
Ok, it looks like I might be on the wrong side of the ketchup debate. I'll have to try TJ's, but I don't want to love something I can't get at a restaurant. SO already carries around light soy sauce in her purse (for her, not me) so we don't want to become that couple. I am loyal to Levi's, since they still fit me (although I've changed from 501 to 541). Most other fashion brands seem to think that all men are skinny-fit, so I can barely wear long-sleeved shirts anymore unless they're dress shirts. I used to love Brooks Brothers, in particular, but they've made it impossible to find a long sleeve sport shirt that fits around my middle without sleeves that tuck into my boots. I refuse to acknowledge my part in why that is.
Ducati. Flawed but somehow irresistible.... Despite a spotty reliability history with my old air-cooled Multistrada, a new Duc could be in the cards for 2020. On edit: also Apple. Less flawed and irresistible. Been loyal so long I didn't even think about at first.
redwing shoes , married to iphone. Love banana republic ... Honda is pretty nice. AP Gi's, Eosin Panther belts ... damn theres a few i guess. Samsung for TV.
Other than Omega and Seiko, I haven't been as brand loyal with other things except: Kiehl's skin care. Ess-a-Bagel bagels. I suppose I always wear Adidas gym clothes because I don't like mixing and matching my gym brands. I am a big fan of Uniqlo for clothes other than dress shirts because they're cheap and replaceable and always stylish. And I just love Mercedes Benz.
Michelin tires! Is there any other kind??? (As Col. Jessup would famously ask when on the witness stand...)
Jack Daniels, Capt Morgan, Sam Adams, Pepsi, Wrigley's, Amazon, Google/Andriod, Microsoft and Netflix...
My wife is on her ninth BMW (a 2018 X1 - the only issue with it is that it's slightly too small for our needs ... we're thinking of going back to an X3 next time). I'm driving my first one - best handling car I've ever had. Other than that, just a few things come to mind: Wright's bacon Boar's Head (almost any deli meat) Hellman's Peet's coffee Milton scrapple (if you're familiar with southern Delaware, you'll know what this is) Hendricks gin Buffalo Trace (many varieties from their distillery) Lagavulin