DENVER - Some might call it a dream job: pot critic. Every week, William Breathes samples marijuana for Westword, a magazine based in Denver, Colorado. Just like wine, there are many varieties of weed: Pineapple Express, Purple Passion, White Rhino… Breathes (a pseudonym) became the first marijuana critic in the U.S. in 2010 after Colorado became one of 18 states to legalize the drug for therapeutic use. Breathes’ job was to smoke pot and give his readers a review. In one of his first pieces, Breathes confessed having a hard time getting used to being paid to get high and being able to expense his weekly consumption. The job does have its responsibilities that are sometimes difficult to live up to when high. “I still have to write on deadline and answer to my editors,” says Breathes. For Christmas, the reporter made a list of marijuana gift ideas including a personal vaporizer – styled on the e-cigarette – called “the cloud.” Medical marijuana was a great success in Colorado; even though the state seems relatively healthier than other U.S. states (obesity rates are among the lowest in the country). More than 107,000 “patients” obtained a card allowing them to buy marijuana. There are now more marijuana dispensaries than Starbucks Coffee shops in Denver. Medical marijuana sales represented an estimated $200 million in 2012 alone - several millions of which went to tax authorities. Producers were smart enough to work closely with the authorities to get rid of the rotten apples. A license costs about $18,000 and helps fund a special law enforcement division.