i added a ton of ambient lighting to my '14.
front footwells (i have 2 sets of lights for the front footwells - one is bright and is wired to come on when the door opens. the other is a lot dimmer and is on for driving a night, just to give a little light in the footwells).
i put some lights in the 'cubbies' on either side of the center console:
in the cubby on the back of the center console:
added lights under the front seats to light up the floor of the back seats. these come on when the doors are open:
and then probably my favourite one... i made an insert for the bottom of my cup holder!
i still have lots of plans to add other lighting elements to the truck - just need to find the time! life was much easier before kids! ha! ha!