Looking back on this, it seems that some of the userboxes have been moved and the variables have been removed in the process, some are now out of date or inaccurate (views changing, or acquired more knowledge), or are simply contradictory of other userboxes I have used (and had probably been misread at the time when pasting them here). Enjoy.
It's really not that hard to use each word in its proper manner.
its
This user understands the difference between its (of it) and it's (it is or it has).
’s
Thi'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.
to too two
This user thinks that too many people have no idea how to use words that they should have learned in grade two.
their there they're
This user thinks that there are too many people who don’t know that they're worse than their own children at spelling!
your you're
This user thinks that if your grammar is incorrect, then you're in need of help.
A, B, and A and B
This user prefers to use the serial commaonly when its omission can be confusing.
they
This user considers singular they standard English usage.
This user always has extra time on his hands and is always bored. If I hadn't done this I would be really bored. If I was bored I don't know what I would be doing. Boredom is the worst thing to feel in the world. I wish I had something to keep me from being bored. I can't stand boredom as you can probably see. I wish there was something for me to do a lot more. Life is boring so I am always bored Uh-oh, I am afraid people have stopped reading this.