This is what I've noticed about Nintendo fans since I started surfing internet gaming websites about Nintendo fans that is NOT applicable to PlayStation, Xbox and PC gamers. These aren't all negative or positive, the company should be held upto some of these standards but on others I can agree with them. They are:
They don't complain about hardware capability of their system and its price to performance ratio.
They don't complain about lack of big AAA third party games on their Nintendo platform and are willing to spend more on another entirely different platform for that even though they want to play those games on their own platforms.
They don't mind having only a few new games to play every year.
They are highly excited for almost any game that is made by Nintendo because its made by Nintendo and looks fairly decent.
They like portable gaming as much as gaming on a TV or monitor.
They don't mind a lack of content, or don't perceive a less than 50 hour long game as a short game.
They prefer PIXAR like graphics over realistic graphics.
They prefer gameplay simplicity and accessibility over depth.
They are less critical of their company of choice over any issue and the criticism that comes from them for their preferred company is more constructive and doesn't consist of blanket statements.
They like playing retro games more than others.
They almost only discuss Nintendo games and not any third party games even when they do have other platforms to play most third party games that they say they bought to play those third party games.
Edit: These are based on comments on various sites, discussions and buying habits I've noticed. Rather than spewing hate for some of the statements that you don't agree with come up with a rational reply.