Working in a place for a long period of time creates a sense of community. If you are satisfied working in that environment (which is quite rare), you might want to give gifts to your coworkers. There is one more person you might be considering, and that is your boss. If you have a good boss, again not very common, it makes a great difference in your affiliation with the workplace and the people you work with. That's why it makes sense to buy appropriate gifts for your male boss on his birthday or any other special occasions.