A lot of people are very shoulder dominant when they chest press so form is key. Plus incline presses hit them hard. Therefore many stimulate front delts much more than other areas of the shoulder. Many don't even need to shoulder press and would be wise performing lots of lateral raises as their main shoulder movement.
Rear Delts tend to respond best to higher reps due to their function. But go heavy too... as the above stated use a variety of exercises, rep ranges, techniques etc.
I like to do a variety of rear delt exercises but enjoy incline bench rear delt raises using a variety of different techniques. The same can be performed standing too. The reverse Pec Deck is a good machine movement for rear delts. Here is a great thing to do as displayed by JM in one of his vids...
Hang and Swing Destroyer Set - YouTube
This is just a normal set of rear delt swings...
Rear Delt Swings - YouTube