Don't mind them if they don't say much but not keen on the cringe-worthy ones for kids. Was in Next today and saw one that would have fitted DS which said "attitude" on it. And did mention to DH that I didn't really need reminding that he had an attitude. But DH was too busy fake puking over one for DD which said something along the lines of "I never said I was a princess but if the cap fits...." with a picture of a crown.
Sorry probably offended loads of people now. [blush}
And at least these do not contain sexual innuendo for children.