I was brought up in a family who are non-vegetarians. Now as a practicing Buddhist, I choose non-meat food.
Eating or not eating meat is a personal choice. One does not have to be a Buddhist to be vegetarian. There are many reasons why a person goes vegetarian. It may be for spiritual reason, compassion, health etc. Some people, who cannot bear to see, hear or read of animals being slaughtered for its meat, organ, fur, bone, horn, etc. may not be Buddhists. Being a Buddhist and vegetarian does not mean the person is compassionate.
There are some vegetarians who make uncalled comments when they see others partake in meat. But these vegetarians forgot that they were once meat eaters.
For Buddhists, who aspire to gain Bodhicitta, not eating meat is one of the main practices.
For the health conscious, not eating meat may mean less clogged arteries.
For animal lovers, not eating meat may mean, less animals will be mercilessly slaughtered. Less demand equals less killing.
For meat lovers, please go for regular health check-up.