My favorite t-shirts are what we call our "Kanye" shirts. They're black v-necks we got for a pre-recruitment event, and they have GPHIB written on them, and they change colors as GPHIB repeats down the shirt. We call them our Kanye shirts because the neon letters have little slits in them like the Kanye glasses.
They look like this:
Another favorite t-shirt of mine is from probably 1999, and it was handed down to me by someone in my family. On the front it has the south park characters, and on the back it says "who gave kenny a bid?"
My least favorite t-shirt is this shirt from a social event, and it has a grammatical error. No one in our chapter wore it after the event because of that.