Before the man of the house and I started home-brewing, we considered ourselves fairly discriminating beer drinkers but could always find something at a restaurant or bar to satisfy. Then we started home-brewing. Now Smithwicks, Sam Adams' Summer Ale, and others that we had previously enjoyed just don't do it for us anymore.
For example - I still like some of Sam Adam's seasonals - like their black lager and imperial stout. Leinenkugel is almost universally disappointing. Killians and Shinerbock fell by the wayside.
Some breweries we still love: Dogfish Head, Bell's and Weyerbacher are our most common go-to's. Guinness, when properly poured from a nitrogen tap, is still great (especially when it's cold and rainy out and you have shepherd's pie in front of you and football on the TV).
Most of the fun beers we've found through the "make your own six packs" at Total Wine and elsewhere have also survived home-brewing - like Sam Smith's Oatmeal Stout, Old Rasputin, good Belgian beers, etc.
Any other home-brewers with similar stories of beers they no longer appreciate or appreciate more after making their own?