Video-calling my friends and acquaintances would be seen as totally creepy, it's text all the way. Phone calls in case of a real emergency (and for some work tasks, unfortunately), but otherwise it's text-only.

In case you have lots of information to share you can also leave a recorded voice-message via WhatsApp, but that's all done in a asynchronous way, i.e. the person receiving the recorder voice-message can listen to it whenever he/she feels like it.