As far as writing.... Tarantino wrote 'From Dusk Till Dawn' and also suggested a lot of directing ideas to RR because Tarantino was writer/actor and on the set all the time.
Natural Born Killers was written by Tarantino but was very disappointing to him because Olive Stone strayed so much from the script.
I believe the True Romance script was non-linear like Pulp Fiction and Reservoir dogs but director Tony Scott made the plot linear. Tarantino also had a down ending in the script but either TS or the studio made Christian's character alive at the end.
QT was not happy with the changes but grew to be more okay with them.
