Consistent compliance with Wikipedia policy is more important than your personal beliefs. Inconsistent compliance is a good sign of activist editing.
For example, if you assert something, and are presented with countering evidence from a reliable source, do you consider changing your position like a reasonable editor, or do you ignore it to argue your position?
When you join a wiki community, be a constructive editor.
When creating articles on forums, fansites, or other webpages, remember that Wikipedia has two notability requirements for these types of articles. These requirements are:
The content itself has been the subject of multiple non-trivial published works whose source is independent of the site itself
The website or content has won a well known and independent award
While a particular website need not meet both of these requirements, it should meet at least one of them.