Source: http://www.bbc.com/travel/story/20181104-why-the-french-dont-show-excitement
Not only is ‘Je suis excité’ not the appropriate way to convey excitement in French, but there seems to be no real way to express it at all.
When I was 19 years old, after five years of back-and-forth trips that grew longer each time, I finally relocated officially from the United States to France. Already armed with a fairly good grasp of the language, I was convinced that I would soon assimilate into French culture.
Of course, I was wrong. There’s nothing like cultural nuance to remind you who you are at your core: my Americanness became all the more perceptible the longer I remained in France, and perhaps no more so than the day a French teacher told me his theory on the key distinction between those from my native and adopted lands.
“You Americans,” he said, “live in the faire [to do]. The avoir [to have]. In France, we live in the être [to be].”