Our first run of shirts were plain grey with large black print saying.."I hope you choke".
I think blunt and straight to the point is the way to go.
haha what, yeah that will make people want to go veg......
haha you'd be surprised, it was actually a quote from lyrics from one of our songs.
We sold out of those tees pretty quickly.
I don't mean re-use I hope you choke, as it wouldn't have any context outside of our band shirt. But short and to the point slogans work. take "Go Vegan" for example, it's pretty clear what you are trying to promote.