If you are in search of the best ezine formats, here are three of them.
1.Text Ezine- This is the most common and the only that you will ever need is your own wirting skill.
2. HTML Ezine- through HTML, you can make your ezine more sophisticated and appealing to your readers or subscribers. You can change fonts, put pictures and etc.
3. PDF Ezine- This is the least common because it consumes a lot of time and effort. They are usually published on amonthly basis. The upside for this is that you can put in your affiliate links in your PDF eZine issue and allow your subscribers to pass the eZine issue around.
With these choices, you can choose which format would suit you and your Ezine the best.