This user is a member of WikiProject Userboxes. This WikiProject aims to organize, expand and improve all Wikipedia's userboxes. We want to make it easy for users to make their own, and to find others, as well as create a standard for all userboxes, including naming conventions and content standards.

Sample of Userbox	Userbox tag†	Parameters‡	Notes
This user is very interested in Ice Hockey.	Hockey-interest|team|category	team - The team you're a fan of cat - The user category for fans of that team	This userbox has two forms, see the userbox page for in-depth details.
This user is interested in everything in, around, or about location.	Location-interest|loc	loc - The name of the location	You have to manually add the Categories for Wikipedians from location, if desired.
PC gaming really floats this user's boat!	PC-gaming-interest	None.
This user has an avid interest in computer programming.	Programming-interest	None.	This userbox automatically adds the page it's included on to Category:Wikipedians interested in computer science.
This user is a reality television addict.	Reality-TV-interest	None.

Sample of Userbox	Userbox tag	Parameters	Notes
This user prefers their userboxes to be uniformly sized.	Uniform|pronoun	pronoun - What pronoun to use	pronoun defaults to "their" if not given. This box does not add the user to a category.
This user has altogether way too many userboxes.	Way-too-many-userboxes	None.	No longer adds user to any category.

Sample of Userbox	Userbox tag	Parameters	Notes
This user is part of the Cleanup Taskforce. Their desk is here.	Cleanup|pronoun	pronoun - What pronoun to use in 2nd sentence	pronoun defaults to "Their" if not given. This box does not add the user to a category.
T.O. This user is a proud member of WikiProject Toronto.	WikiProject Toronto	None.	Doesn't add to any category.
This user is a member of the Good Article Wikiproject.	GA	None.	This userbox automatically adds the page it's included on to Category:WikiProject Good Articles participants.

Notes:
^† All userbox tags are in the form ((User:Dvandersluis/Userboxes/userbox-name)), where userbox-name is the "tag" listed in the table. Pipes (|) separate the name from any parameters. Clicking on the link will take you to a page with full instructions.
^‡ Each parameter can also be used without a name, in the order they are listed in the parameters box (ie. x|foo=y|bar=z can be refered to as just x|y|z). Parameters in bold text are required, but all others are optional.