Big fan of wikipedia here - I use it on a daily basis. Finally bit the bullet and started to edit articles where I have some expertise (mostly horse racing for now at least).
This user has been meaning to join the Procrastinators' Club for several years.
Articles
I flutter around on horse racing articles, alternating between article improvement from the clean-up list, racing updates, semi-random drive bys and the odd new article.
New Articles
Squirt - grandsire of Eclipse, not much else to be found
Mr. Prospector sire line - a counterpoint to the Northern Dancer sire line, but is anyone else interested?
Revisions
I try to do a lot of routine maintenance and upgrades, with a bit more time on some favorite topics. Here are some of the ones I've worked on a fair bit, in no particular order:
Secretariat - Worked with Montanabw to bring to FA!
Man o' War - brought this to GA Feb2018
Northern Dancer - brought this to GA April2020
Dan Patch - hope to get to GA
Kincsem - hope to get to GA
Zenyatta - hope to get to GA
Eclipse - more to come
Winx
War Admiral
Dr. Fager
Count Fleet
Bold Ruler
Seattle Slew
Sadler's Wells
La Troienne - Love this mare!
Personal Ensign
Native Dancer
Kentucky Broodmare of the Year
Tapit - bit of a breeding junkie here. Also love the grays
Potoooooooo
Byerly Turk
A.P. Indy
Nyquist (first article I worked on!)
Dance Smartly
Ashado
Ruffian
Funny Cide
Fourstardave
Ben's Cat
Lava Man
Kitten's Joy
Chad Brown
Mark Casse
John Velazquez
Julien Leparoux
Kent Desormeaux - an early one
National Museum of Racing and Hall of Fame - added detail for the horses
WinStar Farm
Thoroughbred breeding theories - still needs more work