You don't need separate mata tags for every page however there is no problem if you have different ones. I do believe that meta tags are not important at all - SEs almost don't care about them (only
tags do matter). You definitelly won't get hurt in SEs - no matter what you do with your metatags

(unless you use 'nofollow' command :lol
I can see that a lot of you guys are worried about vanishing form SE, getting banned, black flagged etc. etc. Well, there is no need to panic. Getting SE ban is actually not that easy. Here are my guidelines for SE ban:
1. Put one million words 'poker' on your site with no other content.
2. Put one million words 'poker' in your meta keywords and description (it may not work because as I said SEs don't care too much about metas).
3. Start spamming and putting your links in as many
blogs, forums as possible.
4. Do anything as stupid as mentioned above, nothing particular comes to my mind.
5. Exchange links with sites that you are sure are applying suggestions listed above.
And if you don't do any of these you will be ok

After all, SEs are there to provide people with information, not to ban everyone who makes the slightest mistake.