How Often To Update Your Plugin

I have a plugin that works great with WordPress and works with the newest versions as well as older versions. It does what it needs to do and does it right. There aren’t any annoying bugs in the code. It just works solid.

I often times wonder if I should just update it for no reason. See, people expect you to update your plugin from time to time. They want to you update it to fix bugs even if no bugs exist or so it seems. I am in a bit of a quandry here trying to decide what I should in fact do. How often to update it?