In essence, "excited" means RECEIVING excitement and "exciting" means GIVING excitement. ------------------------------------------------------------------------------------------------------------------------------------------------------------ "I am excited" is passive voice and describes the subject => an excited me. (I am receiving excitement from someone else. "I am exciting" is present progressive tense => I excite others => I make others excited. (I am giving excitement.) "I am exciting the audience" means I are causing the audience to become excited. (I am giving excitement to the audience.)

Words like those above and dozens of others (interesting/ interested, confusing/ confused, boring/ bored) are called participial adjectives. They are the present (ing form) and past (ed form) participles of verbs. It is important to know who or what the adjective is describing in order to know which to use. For example: "This movie bores me." Bore here is a verb. The movie is the subject and "doer" of the action "bore". "Me" is the object, receiver of the action. So we could wrote this another way: "The movie is boring." We use the present participle because the adjective is describing the "doer" of the action of boring someone. But, "I am bored" because I am the receiver of the action, thus passive voice, and we use the past participle. Another example: “This lesson confuses the students”. Thus the lesson is confusing. The students are confused. They are confused students.

Adjectives ending in -ed are used to describe how people are feeling. Ex: I'm excited to go to the park today. Adjectives ending in -ing are used to describe things and situations. Ex. The park is an exiting place to be.

'excited' is a state of being. "I'm really excited for this vacation". Exciting is you think something is thrilling "This vacation is so exciting!'

Adjectives ending in -ed are used to describe how people are feeling. Ex: I'm excited to go to the park today. Adjectives ending in -ing are used to describe things and situations. Ex. The park is an exiting place to be.