About T-Shirt Design
The joke on It's Not Easy Being Easy. T-Shirt is easy to understand, and that is a big part of why it works. It fits really well with everyday humor, but you do not have to be obsessed with that stuff to enjoy the joke.
It makes sense for birthdays or casual days, especially if the person already likes this kind of humor. It has that sarcastic t shirt attitude people like when they want something a little more blunt.
It has enough personality to be funny without looking like it is begging for attention.