personal choice is often based on a persons idea of what is right and wrong
animal welfare is a concern dor many people and people may choose to eat foods where they know the animals have been treated ethically such as free range products or they may avoid eating meat altogether eg vegetarians or vegans
working conditions:
fairtrade products are popular with customers who want to make sure the farmers in developing countries get a fair price for their produce
fairtrade products are often slightlymore expensive than non fairtrade items
environmental impact:
people may prefer to buy british or local produce, or foods that are in season, in order to support the local economy and reduce food miles
some fish products say whether the fish was caught using sustainable methods, to avoid ecosystem damage or extinction
eating naturally:
some people prefer to eat organic foods which are produced without the use of synthetic chemicals
organic foods are grown using natural fertilisers and natural pest control
people may want to avoid buying GM foods, over concerns about unwanted effects on the consumer and the environment