As someone who has been smoking weed for at least 15 years and who lives in Washington I have never had as much control over how high and what type of high I got. Before legalization if you didn't have a medical card or you didn't know several illegal growers you might be lucky to find a dealer who "stocked" 3 or 4 different strains, but even then it'd be hard to know if s/he knew what they were talking about. Now the percentages of everything I care about plus often a list of pesticides used is printed right on every package.