Why? Write your CSS. Test it in browsers. If something doesn't look right, fix it. Resets are bloat.
That's the reason for resets. Because "browsers" could mean one of a million different browsers and it would take forever to tweak each of them, since CSS isn't the same across the board. I'd like to see some CSS that isn't using a reset that looks perfect across IE 6, 7, 8, 9, Opera X-Z, Chrome X-Z, Firefox X-Z, and Safari. Additionally, I'm guessing such CSS could probably be done faster with a reset.
In other words, manually do a reset. You can't say reset is unnecessary and then say first thing, just do a reset.
font-size:100.01% is useful, too. http://stackoverflow.com/questions/4541421/is-using-font-siz...