About T-Shirt Design
The idea behind I'm Not An Asshole I've Gone Way Past That By Now T-Shirt is not trying to be fancy. It is just a fun shirt with a clear joke. The everyday humor angle gives it a little extra personality without making the design too busy.
It makes sense for birthdays or holidays, especially if the person already likes this kind of humor. As a novelty t shirt, it has a simple idea that is easy to notice without feeling overdone. This one is mostly about having a little fun with what you wear, which is kind of the point.