I confess, I have turned to the dark side and gotten userboxes. I figure that if I'm going to have them, though, then I might a well go ahead and have a bunch. So without further ado, here they are.

This user is a college student.
This user aspires to be a physician.
TKE This user is a man of sterling character.
This user's favourite colour is blue.
This user does not smoke.
linkspamThis user despises linkspam, and will terminate it on sight, as well as any other spam by the contributor.
vanityThis user supports the removal of vanity pages with extreme prejudice.
LacInt This user is Lactose intolerant
7,000+This user has made more than 7,000 contributions to Wikipedia.
IQ This user's Intelligence Quotient is 145.
IP addressThis user supports mandatory registration.

Language

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en-GB
-2
This user has an intermediate understanding of British English.
IntS-0This user has no interest in Internet slang, or talks like an offline person.
LE-0This individual still maintains a shred of dignity in this insane world by adhering to correct spelling, grammar, punctuation and capitalisation.
byThis user does not use the passive voice.
man-
kind
Regarding gender, this user prefers the vernacular, not what is politically correct.
less & fewerThis user understands the difference between less & fewer.
A, B, and CThis user prefers the serial comma.
’sThi's user know's that not every word that end's with s need's an apostrophe and will remove misused apostrophe's from Wikipedia with extreme prejudice.
its & it'sThis user understands the difference between its and it's. So should you.

Stances

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  This user understands biological evolution.
 This user has been touched by His Noodly Appendage.
  This user supports and encourages the practice of safe sex.

Entertainment

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  This user is a Time Lord.
 This user was cast in the name of God and is not Guilty.
 This user has a
cunning plan, my lord.
TABak user derka derka derka!
Star
Wars
This user supports the Rebel Alliance.
M.D.This user watches House.
Scrubs This user is the world's most giant doctor.
FarThis user watches Farscape.
RDThis user is full of smeg.
 This user is a hoopy frood who really knows where their towel is.
STAR WARSThis user would shoot Greedo first.
 This user is a Jedi.
 This user attends, has attended, or hopes to attend Starfleet Academy.
R This user is a Ravenclaw.
FLThis user only likes A Bit of Fry & Laurie.
This user secretly wants to be the Blue Power Ranger

Computer

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 This user runs macOS.
 This user contributes using Safari.
 This user contributes using a wireless connection.
farkThis user is a farker.
 This user uses Wikipedia as a primary point of reference.

Ancestry

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 This user is of English ancestry.
 Alba
This user is of Scottish ancestry.
 This user is of French ancestry.
 This user is of German ancestry.
  This user is of Irish ancestry.
LipsumLorem ipsum dolor sit amet.
 This user believes that caffeine is necessary in large doses daily.
 This user drinks bubble tea.
PepsiThis user prefers Pepsi over Coca-Cola.
  This user eats sushi.
 This user is a certified scuba diver.
 
This user knows by heart the first 10 digits in the decimal representation of pi.