It's always nice to end your sentences with an exclamation mark, and not a comma. Joey Santiago
Yum-O! I say this if something is so good that 'yum' just isn't enough of an exclamation. The accent is on the 'O' as in, 'Oh! That is so good!' Rachael Ray
Five exclamation marks, the sure sign of an insane mind. Terry Pratchett
I used to enjoy using dots where they would be least expected, not at the end of a sentence but in the middle, creating the effect... of a skipped beat. It seemed to me the mind reacted - first!... in dots, dashes, and exclamation points, then rationalized, drew up a brief, with periods. Tom Wolfe
Cut out all these exclamation points. An exclamation point is like laughing at your own joke. F. Scott Fitzgerald