OK, so since you haven't actually bought the pass yet, time to do your own leg work and compare costs. Not the inflated, 1st class only costs quoted by Rail Europe and other ticket resellers, but the actual price directly from the individual national rail companies. Your trip involves so many countries that rather than hyperlink each nation's passenger rail service, this guy's website has links to all of them (although you have to dig to find them). Only when you see the quoted ticket price directly from the operator, and considering the usual substantial 2nd class early purchase discounts if you can commit early to riding specific trains in advanced, and compare it to all the mandatory fees the rail operators place on pass holders, then consider if a pass saves you money. In about 10 years of spending too much time on this website, I don't think I've seen a single itinerary that ended up being cheaper with a rail pass, apart from the rare traveler who insists on traveling first class.
Now that we have a little better idea of your itinerary, I can make a few more comments, but I'll restrict them to the countries I know. Domestic trains within the Netherlands do not require or offer reservations, and are generall pretty cheap. Far cheaper than the daily cost of a rail pass. If I'm reading correctly, you're heading from France to the Netherlands. You will most likely ride the Thalys high speed service, and as others have mentioned, you would need to purchase a special supplement to ride this train. I'm not sure, but when you compare the daily cost of your pass plus the supplement, it's probably cheaper just to buy the advanced purchase ticket.
Amsterdam to Copenhagen is operated by two to three different companies and takes over 11 hours. Have you considered adding a stop somewhere in between to break up the trip? You didn't specificy from where in Denmark you plan to depart to Berlin, but if it's Copenhagen and you book in advanced, the trip costs as little as €59.
For "interior Germany", I refer you to Lee's post above.
And just to emphasise again, so that you're not caught breaking the law, you can only spend 90 days in the Schengen Zone (basically, every country on your trip) in any 180 day given period, unless you apply in advanced for a visa. But that's a whole other can of worms. So, you need to cut something out to stay legal.