I have a couple observations, and I'd like some input. The first two functions are the functions that are the most natural and easy to use and that one is most comfortable using. It seems that the 1st function is what you automatically are, and the 2nd function is what you automatically do(and I think the 3rd function is what you feel you "should" do). It also seems that extensive use of the 2nd function exhausts a person, while the 1st function doesn't. However, when the 1st function is used and the second function is not, a person does not feel stimulated.
Using myself as an example, I can't have too much Si, but I get bored if that's all I'm doing. Fe is fun and easy to use, but it wears me out if I do it too much and then I feel like I need to Si for a while to relax. (lol Si isn't a verb)
Does this sound right?