Some people can't stand being alone. I love solitude and silence. But when I come out of it, I'm a regular talking machine. It's all or nothing for me.

This quote means that some people feel very uncomfortable and anxious when they are alone and have no one to talk to. However, the speaker loves spending time in solitude and quiet, but when they come out of that and able to interact with people again, they become very talkative and chatty. The speaker is all or nothing, meaning that they quickly shift from one extreme (enjoying solitude) to the complete opposite (enjoying being around people).