Many people really like using CSS. I think it's good for some things, but when you depend on it for the format of the entire page/site, I think it sucks. Not every browser will like the same things, will render correctly or will always do as you expect. All browsers, however, will understand the standard table tags to make a table and obey the positioning. Not so with CSS which tiles things like a table.

After you finally get it all looking nice in IE, Firefox, Safari, Opera, etc... by fiddling and putting in special rules, someone will email saying it looks like crap on their browser, and they don't want to upgrade it.

CSS is like salt. Using just enough to give some flavor is good, but add too much and you have to balance other spices to fix it.