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You wouldn't put the same exact page copy on each page would you? :) No, you want variety! View the meta tags and title tags on each page the same way you view the page copy. Tailor them to the content of that page.
Remember that the title tag is one of the MOST important tags in SEO for a site. Take advantage of it. Optimize each page of your site for 2-3 keyword phrases, and then optimize the title tag (and the metas, headline tags, body copy, etc...) around those phrases.