Thanks Gary. html format not only give authors various ways for text formatting, but also allow you to use special characters in your story, like £ or å.
I haven't really thought about which tags should be used, which shouldn't. But I will always try to use the simplest and most common tags.
Most stories submitted as Word doc or rtf files. But I still don't have a good format converter to convert them to html format. I don't use Word to "save as" html because it adds a lot of junk in the html file. So at most times, I will still manually check the html format to make sure it looks ok. If you can send html file directly, you will save me a lot of time. But please keep your html codes as simple and clean as possible.
I will use html format for all new stories. But I won't use it to the old stories unless the author could submit a new version of the whole story with all the necessary formats.