In other words, impact counts. Editors are more likely to buy a story that hits them strongly on the first read. Whether a story is meant to be read more than once or not, the first read is the most important. If you're having trouble with dialogue, I highly recommend reading the work of Elmore Leonard. You can pick up almost any of his books, turn a page at random, and find terrific, effective dialogue.
People speak in idiom.
Most people do not speak with perfect grammar or sentence structure. Leonard's dialogue runs fast and furious. It is not appropriate for every kind of story, but you can still learn from him. The first line and paragraph of a story count. OMNI Toons Questions, comments and suggestions can be mailed to the webmaster .