Well there is a new patch coming out in supposedly less than a week. This patch is very simialiar to D2's 1.10 patch in that it is very large and anticipated. Many people have quit playing until the release of the patch due to the fact that you will not be able to play your old character on the new realms with the patch. Well if you want to start playing it then in about 1 week is the time to start because everyone will have to start fresh again with you.

Twenty-eight days... six hours... forty-two minutes... twelve seconds. That, is when the world will end.