how your character speeks is important for the story am i right?  well some dont know how to do that.... and it makes the story crumble and die.... do you agree?

-dont force it (sounds fake)

- if it sounds odd then dont do it

- if its something no one would say in whatever situation... dont do it

stuff like this bugs me.....

The best thing, IMO, is to avoid writing dialogue until you're comfortable writing a story with none of that, while at a high level.