Bourdain appeared five times as guest judge on Bravo's Top Chef reality cooking competition program: first in the November 2006 "Thanksgiving" episode of Season 2, and again in June 2007 in the first episode of Season 3, judging the "exotic surf and turf" competition that featured ingredients including abalone, alligator, black chicken, geoduck and eel. His third appearance was also in Season 3, as an expert on air travel, judging the competitors' airplane meals. He also wrote weekly blog commentaries for many of the Season 3 episodes, filling in as a guest blogger while Top Chef judge Tom Colicchio was busy opening a new restaurant. He next appeared as a guest judge for the opening episode of Season 4, in which pairs of chefs competed head-to-head in the preparation of various classic dishes, and again in the Season 4 Restaurant Wars episode, temporarily taking the place of head judge Tom Colicchio, who was at a charity event. He appeared as a guest judge in episode 12 of Top Chef: D.C. (Season 7), where he judged the cheftestants' meals they made for NASA. He was also one of the main judges on Top Chef All-Stars (Top Chef, Season 8). He made a guest appearance on the August 6, 2007 New York City episode of Bizarre Foods with Andrew Zimmern, and Zimmern himself appeared as a guest on the New York City episode of Bourdain's No Reservations airing the same day. On October 20, 2008 Bourdain hosted a special, At the Table with Anthony Bourdain, on the Travel Channel.
Bourdain was noted for his put-downs of celebrity chefs, such as Paula Deen, Bobby Flay, Guy Fieri, Sandra Lee, and Rachael Ray, and appeared irritated by both the overt commercialism of the celebrity cooking industry and its lack of culinary authenticity. He voiced a "serious disdain for food demigods like Alan Richman, Alice Waters, and Alain Ducasse." Bourdain recognized the irony of his transformation into a celebrity chef and began to qualify his insults; in the 2007 New Orleans episode of No Reservations, he reconciled with Emeril Lagasse. He was outspoken in his praise for chefs he admired, particularly Ferran Adrià, Juan Mari Arzak, Fergus Henderson, José Andrés, Thomas Keller, Martin Picard, Éric Ripert, and Marco Pierre White, as well as his former protegé and colleagues at Brasserie Les Halles. He spoke very highly of Julia Child's influence on him.
Bourdain was known to be a heavy smoker. In a nod to Bourdain's two-pack-a-day cigarette habit, Thomas Keller once served him a 20-course tasting menu which included a mid-meal “coffee and cigarette,” a coffee custard infused with tobacco, with a foie gras mousse. Bourdain stopped smoking in 2007 for his daughter.