Many times 'what it takes' has less to do with talent and more to do with the capacity to take songs someone else rejected or flat-out steal them from another artist.
Sometimes you're born with an awesome name like Dave Grohl, and other times you're given the unawesome name of Marvin Lee causing you to make it awesome by renaming yourself ... Meat Loaf.
There are those musicians who, for whatever reason -- an off-putting comment, a generally grumpy demeanor, the fact that they're opening that night for Sinbad -- are a little less agreeable.