The first half of the alphabet!
Don't put these things on your shirt:
A) Pirates
B) Silloutte's
C) Ninjas
D Butterflies (Like Flowers in the Attic)
E) Food with faces
F) Pandas
G) Zebras
H) Barcodes
I) Hearts
J) Lame Puns (Good ones are okay, but no...I'm the bread-st with a picture of a piece of bread with a ribbon saying number 1)
K) Blatant Rip offs of jokes on Popular T.V. Shows
L)High detail drawings of completely random objects in a non-artistic fashion. (For example: Andy Warhol's Banna would get a $5...if he submitted it and it was original. A picture of a door will get you a 0.)
M) Several "Themed" shirts that you can only understand if you see them all together. No one is going to let all 8 of your t-shirts though. No one is going to give you 16,000 dollars for this bullshit.