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I use an elderly Homesite. I have used on occasion Netscape's Composer.
Depends on final application: Glitz or content. Want glitz? All of the above. Each offers a plethora of gimmicks and gadgets to make it look good. Won't make the content any better, but it will LOOK good.
Design view in DW is WYSIWYG, but the Code view is *exactly* like using a text editor (like Notepad) to code by hand, except that there extra time-saving features and you get a LOT of help identifying your HTML errors. Plus, you see can how your page is coming along within a second by switching over to Design view to take a look.
It's the best of two worlds.
I don't consider software generated CSS to be good to use, since names like style4 or table6 (which FP does) and all individually coded styles like for margins are done the long way; coding by hand, you can name everything intuitively, use shorthand, and comment the styles liberally, so the site is easily maintainable.
I first learned HTML using Notepad, and still think it's very important to have good knowledge of it. DW does give a head start though.
Learn yourself what PHP includes are, so you can make pages from re-usable chunks of code - saves a LOT of time in maintenance.
Learn the basics of CSS (so you never use <br> or <font> tags in your sites).
Remember to mark up your content as headings, paragraphs, lists, tables, and forms. Learn how to show images, and insert links.
Then get experimenting...