I definitely enjoy adding Userboxes.

CThis user can program in C.
C++This user can program in C++.
hsThis user can program in Haskell.
<html>This user can write HTML.
CSSThis user is a native speaker of Cascading Style Sheets.
This user contributes using a PC they built themselves.
This user contributes using Linux.
KBThis user asserts that a kilobyte is 210 bytes, not 103 bytes.
This user is a Monty Python fan.


This user would like to know what a black hole looks like from inside, but doesn't want to investigate it personally.
This user knows the dire side effects of dihydrogen monoxide.
Do you?
John LockeThis user is an empiricist, and believes that knowledge is subject to continued revision and falsification.
~(p&~p)This user studies the concept of logic.
KThis user uses the Kelvin scale, because 0K is much cooler than
−273.15°C or −459.67°F.
This user understands Physics at an advanced level.
This user knows more about pulsars than about what they did this morning.
This user is interested in Celestial mechanics and Astronautics


This user enjoys electronics or is an electronics hobbyist.
This user is a licensed amateur radio operator.
LipsumThis user uses lorem ipsum as placeholder text to demonstrate the graphic elements of a document or visual presentation.
This user supports public transit.
U.S.
spelling
This user prefers to use
American English spelling.
big wordsThis user opposes the use of esoteric, abstruse and recondite big words in Wikipedia articles when simple ones will do.
couldn't'veThis user believes that couldn't've would make a perfectly fine word.
subj This user prefers that the subjunctive mood be used. Were this user you, they would use it.
its
it's
It's really not that hard to use each word in its proper manner.
Latin Plurals: "Data is are..." This user uses "data", "media", "memoranda", "criteria", and "agenda" as the plurals of "datum", "medium", "memorandum", "criterion", and "agendum".
???
?!?
!!!
This user terminates excessive use of exclamation points and question marks on sight. Grow up!
This user knows the difference between a dash and a hyphen, and follows MOS:DASH.