The other day I was talking to a friend via email about communication styles. Some people aren't that good at keeping in touch via emails (they're better at doing this over the phone or face-to-face). Some people are better at communicating via emails rather than face-to-face or over the phone. Some people are good at communicating using all those means of communication.
Personally speaking, I'm not too fond of communicating over the phone, except when it comes to talking to my friends or those people I know pretty well. If I have to call the authorities or do stuff like that, I feel more comfortable asking first via emails (if it is an option). First of all, it's easier to forget what I'm supposed to ask (if I have to ask about many things over the phone) and when you talk to someone over the phone or face-to-face, it's easier to lose track of what you really want to say 'coz the topics may change quickly depending on the other person's reactions/responses. Sometimes there are also other distractions in real life that halt the conversation even before it's finished.
When it comes to emails, for me it's a better way to express your ideas/thoughts in some ways 'coz you can focus on what you really want to say/ask. You can even review and rewrite your points/questions before sending it. The problem is whether or not the other party will read and reply it.
One friend of mine says that she prefers talking over the phone or in real life 'coz she wants immediate responses/answers. However, having lived apart from my family and friends, we've learnt to use email as a more frequently used media of communication. Up till now, I'm still not too fond of speaking over the phone, esp. if I have to use Finnish HA HA HA HA HA HA...