Vegetarian (even vegan) people, how did you feel after switching your diet to a vegetarian/vegan one?

BiscuitesSwag
I want to try a vegetarian life style for a month or something and I want to hear about some experiences from other people. :)
Like, how did it change your energy level, apetite, weight, etc?
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Vegetarian (even vegan) people, how did you feel after switching your diet to a vegetarian/vegan one?
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