If Web Design site has been around for a while, you'd probably have been visited by the "Web Design Police" (people who have a lot of time on their hands). In fact, depending on your site, you might have been visited by different branches of these people, both advocating opposite policies.
On the other end of the scale are the people who believe a good website must have much colour, graphics, animation and sound. You might meet them, for example, in the form of newcomers or pundits who either do not have much real world web experience or who only surf on T1 or broadband connections.
My first encounter with such people came in the form of an old friend who exhibited his personal website proudly to me. At the centre of his home page was a large animated graphic that was a few hundred kilobytes in size.
That graphic had little function on that page it did not provide any informative value: it was neither a logo, nor was it a photo of himself, or an image map, or anything at all. It was purely decorative. At that time (many years ago), I was using a 14.4K modem and that page took ages to load.
Now don't get me wrong. Decorative graphics on a page are fine. They make a page more pleasant to look at, and hence more likely to be read. But you should at least make them as small as possible. While I'm hesitant to give a hard and fast rule about how big such graphics should be, a decorative graphic that is a few hundred kilobytes in size is definitely too big to be tolerated.