aaronroach78 - 3:47 am on Apr 16, 2012 (gmt 0)
There are a few factors you have to take into consideration, I'd say.
Putting crawlers and indexing aside, the site type plays a role in determining the content balance... Is it for media, commerce, a blog, etc.
Loose example, but if you go to something like Flickr, are you going for the copy, or going for the images?
If you go to a news site, are you going to browse products, or catch up on the daily events?
If you go to a commerce site, are you going to read a blog about what the company's up to, or just finding what you're after ASAP?
Don't be ruled by crawlers...focus on what your site has to offer first, what your competitors are doing, and how you can adopt some kind of strategy that reflects what you provide. The value of your site lies there, not by meeting a loose criteria that you think may work to your favour in search engines.