How should my English sound?

Sometimes, people worry about how they should sound in English, and whether it would be better to speak with a British accent, or to sound like an American. This is a good question, but it might relate more to being able to understand different speakers, than to how you should try to sound. As a teacher, sometimes I run into trouble with English resources because the guide to pronunciation is British. It's important to pronounce English correctly, but what does that mean, when Scottish people speak in a completely different way from New Yorkers? I think the most important thing is to speak as clearly as you can, in order to communicate. Communicating is more important than sounding like this person or that person, or trying to speak as a native speaker.
Here's a short video from Misterduncan on this topic. If you like it, you can find a number of other videos from him on YouTube, where he appears as duncaninchina.