The mission of this user is to improve the encyclopedia and have fun doing it. On-wiki and off-Wiki, this user is a self-taught jack of all trades, master of none.
He has no focus on Wikipedia and shies away from no topic or article, although with 6,868,119 (purge page to refresh numbers) articles on the English Wikipedia he has not even scratched the surface of the topics out there. His favorite Wikitask is helping others, for helping is the fastest way to learn. He has a thirst for knowledge and soaks things up like a sponge when immersed in them. He learns by doing, not by talking about it. If you need help, ping him and he will put his shoulder to the wheel with you.
On-wiki he is currently active in many projects with the highlights being Tip of the day, The Wikipedia Library, and Today's articles for improvement (TAFI)—which comes out weekly and is only one article. LOL. He was a double alpha tester for The Wikipedia Adventure, an early adopter of Visual Editor, and uses Flow on his talk page on meta. He was one of the first question-answerers at The Teahouse but never got invited to be or signed up as an official Teahouse host. However, the rest of the answerers pretty well have it covered and no Teahouse question goes unanswered. He has never read any documentation end-to-end on Wikipedia as it is too much to internalize. He reads snippets on a need-to-know basis. He abhors Wikilawyering. If he sees abuse on Wikipedia he will deal with it. He spends almost no time on Wikipedia noticeboards, preferring to deal with things personally. He avoids conflict but can take the heat. He has learned the most by helping and listening to female editors (or self-described females). Only a small handful have been prickly to engage with.
He has also benefited from engagements with editors with disabilities, LGBTQA editors, and COI editors. Scroll up and down this page for more of the fine points on this user's other on-Wiki involvements; you can stitch together facts displayed in the plethora of userboxes this user has posted.
What is an appropriate length for a Wikipedia article? This is discussed at Article length.
An article can be as long as 10,000 words or more, if there are enough sources on the topic to provide for that much content. Undoubtedly there are articles that reach 20,000 words. The recommended maximum length is around 100kB of text. There is no standard for minimum length, an acceptable stub article could be as short as three or four sentences.
If you look at the menu on the right-hand side of any page on Wikipedia, there is a link to Page information. Clicking on that link shows lots of information about the page including its total size as well as how often it has been viewed. There is also this tool - you just copy and paste the text into there, and it counts it for you.
If the sub-category page does not already exist, then you have to create it first (see the tip How to create a category). For example, after you create the Category:Apes by common name page, then you click edit and add [[Category:Animals by common name]] to the bottom of it.
Wikipedia contains age calculation templates that self-update every day to keep date and age information current. These are very useful for a dynamic online encyclopedia and save users from having to regularly update that kind of information.
Many articles including biography articles contain infoboxes which use these age and date templates.
These DYKs were featured in the primo spot on the main page along with an image:
A fact from the article Persoonia terminalis, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
A fact from the article Hors d'oeuvre, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
A fact from the article Clara Henry, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
A fact from the article Planned Parenthood, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
A fact from the article Caitlyn Jenner, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
These DYKs were featured on the main page but without an image:
A fact from the article Carina Jaarnek, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
A fact from the article Margareta Hallin, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
A fact from the article Jozef Raskin, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
A fact from the article Michael Laucke, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
A fact from the article Jacky Lafon, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
These DYKs were pulled from the queue for being focused unduly on negative aspects of living persons:
A fact from the article Jonas Åkerlund, which this user created or significantly contributed to, has been featured in the Did you know... section on the Main Page.
→ link (pull[ed] Jonas Åkerlund (politician) per "Articles and hooks that focus unduly on negative aspects of living individuals should be avoided.")