Thanksgiving was perfect Houston weather for outdoor feasts, family football tosses and, for Luis Matazar, standing in line. Savvy shoppers, some between Thanksgiving meals, didn't camp outside the doorway for days. Stores, to the chagrin of some, have started opening on Thanksgiving, even offering Black Friday deals online days in advance. [...] for the first time, The Galleria opened its doors on Thanksgiving to eager shoppers, though many of the mall's luxury brands like Neiman Marcus, Gucci and Saks Fifth Avenue remained shuttered. Some believe shopping on the holiday intrudes on family traditions, but for others the hunt for a cheap television or perfect holiday sweater is the tradition. [...] there was a bit more of a wait on a sidewalk in Houston, and another round of feasting for holiday cheer.