Whats the difference in creating a Content Type in the Root Site collection to that of a subweb?
I've noticed when created at Root lovel its available to all sub-webs wheras if I create at web level its only available to sites below.
Is there any difference when it comes to associating workflows to Content Types or anything else?
I think when a root CT is used in a subweb, SP makes a local copy at subweb level, so it behaves as if the CT is locally created. Is this true?
Thanks
It is really a matter of scope. You should define it at the widest scope that you would reasonably think to use it. Generally for Site Collections, I encourage people to manage the content types at the root (or on the central Content Type Hub in 2010).
If you have a one off content type, then it is ok to define it at the sub-site. In situations where you have a giant shared, site collection then permissions may play a part in the decision as a sub-site owner would have permission to create one there, but not at the root.
