Shirts I own? The better question is shirts I don't own.

A Choice you need to make
Merit Badge
...Interpretive Dance
I Want to be Friends
Bring Back Naptime!
In the Basement of the Alamo
UFOnky' Gulf Breeze Sightings
Nothing Rhymes with Orange
Stone Jungle
Star Light, Star Bright
Hypotamoose
Get Some Fresh Air
Damn Scientists
Follow It
Reach for the Stars
Stop Destroying Our Earth...
Myopia Utopia
Simon Says...

Among others