I also noticed that I use different methods of communicating with different people.

For example, to talk to my parents I would either call them or WeChat them, and occasionally email to send documents to each other. That way, since my written Chinese isn't good, I can just speak with them by sending convenient voice messages. On the other hand, to make plans with friends in the area or to catch up with old friends, I would just use Facebook Messenger for quick instant messaging. Snapchat is also fun to use for capturing moments temporarily.