Most adjectives can be used in either of these positions, but some adjectives can only be used in one. A few adjectives have a different meaning depending on whether they come in front of or after a noun. You put opinion adjectives in front of descriptive adjectives - You put general opinion adjectives in front of specific opinion adjectives. Many adjectives ending in '-ing' describe the effect that something has on someone's feelings.
Some adjectives ending in '-ing' describe a process or state that continues over a period of time.