Here are some userboxes I made, by looking at the source code of existing boxes and modifying to my taste. Feel free to use them, if you want, although I make no guarantees as to aesthetic pleasure. I was surprised there wasn't already a softball player's box!

Music

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Code Result
|{{User:Arentath8/userboxes/Tegan and Sara}}
T&SThis user is a fan of Tegan and Sara.
Usage

Sports

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Code Result
|{{User:Arentath8/userboxes/Softball}}
 This user plays softball.
Usage