Cultural Traditions are strange phenomena as with our specific not only two regions but also to ethnicities and religious groups. What is interesting though, is how different the opinions of people are on this subject a lot of them think that it's better to adhere by your Customs; I believe however, that actually following the new countries custom is better for two main reason: being adaptive and because it's more economic.
To start with, being adaptive is synonymous with being smart ,and it applies here to first off it helps you fit in your new home which saves you a lot of trouble and the risk of being an outcast. For example, just imagine the trouble of finding cultural clothing, temples or food.
Second of all, it's more affordable because it saves you the extra costs that different countries impose on what will otherwise be considered traditional to you. For instance, it's always more expensive to buy your usual Falafel or carpets.
To sum up, I think it's pivotal for you and people that are actually around you to change your views once you leave your country.