I usually go WTG then ATG but I've switched it up. Need both though, but your face is different.
Everyone has to find what works best for them.
There's a thing called face-mapping that can help you figure out which direction to go on different parts of your face by looking at the direction that the hairs grow. The neck is a problem area for most guys so it's most useful there...took me longer to get a good shave on my neck than the rest of my face.
Mantic59's Shaving Journal: Interactive Face Map
This guy is the king of shaving knowledge and he makes some great tutorial videos:
mantic59's Channel - YouTube