Between Amazon. com and the United States Postal Service, I’ve got nearly everything I need in life!
Pixar
Lucky Brand jeans. They’re well made, I like the styles, and the sizing is consistent–so much so that if I already own a particular style I can confidently order another same style online and know it will fit exactly the same. Of the six pairs I currently own, four were bought online.
Trader Joe’s. Good food and wine all the time; good prices almost* all the time.
*A pint bottle of their house brand maple syrup is ridiculously expensive, but staples like milk and olive oil are much less expensive, generally, than in typical grocery chains.
Nikon and Coca-Cola
I’ve had other brands (both of sodas and cameras), even some VERY premium labels (both of sodas and cameras), but I always come back to my “comfort” soda and camera.
Burt’s Bees
Earthfare
Whole Foods
Disney
Pixar
Saturn (I’m still broken-hearted over their demise)
Goodwill Industries
BJ’s Wholesale Club
Groupon
Les Schwab Tires
General Electric
Vespa
Coca Cola
Can’t really think of anything else… most of the stuff I bought religiously I don’t buy at all now, like Levi jeans, Reebok shoes, Kodak film for my camera …
Not sure if I “like” the companies but some would be…
Dyson
Apple
Microsoft
Sanitarium
Foodland
Subaru
Ikea
Wegmans
I like their company philosophy, I like interacting with their employees, I like the thoroughness and the thoughtfulness that goes into their product selection, and shopping there makes me happy.
Apple
Oracle
Pixar
Marvel
Microsoft
Best Buy
Fry’s Electronics
Barnes and Noble
Blizzard
Bioware
Ferrari, Coke, Sears (for Craftsman tools), BMW, Yamaha and Ducati. And most beer companies.
In my film days, I had a hankering for AGFA, as well as my regular Kodak and Fuji.
Guinness Brewery
Bowmore Distillery
Macallan Distillery
…you get the idea. 
Amazon (ordering stuff that just shows up, with no fuss)
Breitling (watches)
Canon (cameras)
HEB (Texas supermarket chain)
Levi Strauss & Co. (apparel)
Panasonic (cameras and electronics)
Sportclips (amusingly over-the-top haircutting for guy-type guys)
Subaru (cars, natch)
Turner Classic Movies (er, classic movies)
A couple that have disappeared:
Borders (books/audio/video)
Smith and Hawken (yuppie gardening implements)
TOMS shoes.
They’re a bit pricey for what they are, but every pair I’ve owned has been super-comfortable, and they donate shoes to poor children for every pair they sell.
Big Y grocery stores
Big Bunny grocery store (a locally owned store in my town)
Noah’s Art Pet Store (another locally owned store)
Payless
Logitech
Blizzard
Do museums count? If so then Sturbridge Village
New England Country Soup (LOVE!!! Yummy, lower sodium than most other prepackaged soups, decent cost, great addition to things like shepard’s pie)
Camosse Masonry in Charlton MA (horrible song on their commercials but wonderful people, great prices, and huge selection).