Like I've said here before, I have a number of neurological, psychological and other illnesses and conditions that must have been obvious early on but were never diagnosed. My neurologist told me in 2011 that I was deprived of oxygen at birth leading at least to a mild case of Cerebral Palsy. One doctor also told me I obviously have a mild case of autism. And I suspect I may have been born with at least a slight head deformity. But one thing I've noticed since I was a child is that when I am trying to think of the right word, the first word that comes to my mind is sometimes a very big, complicated word. Sometimes the biggest word there is for that. And if I am writing a report or something like that, it can look odd suddenly using a big word. So I usually pause and wait for another word to come to mind. Is there any name for that? And I wonder if it hasn't anything to do with the fact I am gay. Gay men do have a unique way of expressing themselves. I know one theory of sexual orientation is that it is formed early on by in utero hormonal programming.
I find that the words I use often reflect who I am addressing as well as things I've read recently. So whatever you're reading whether an ad or article or more technical or graduate level stuff, words you've recently read will popup first. I took note of that phenomenon before. Now I'm so long out of graduate school, I don't use the more advanced words unless I don't have a simpler alternative. I know perusing social networks doesn't keep ones vocabulary top notch. But imo, it doesn't matter as long as you get your point across. So it's not an individual psychological issue at all. You just assumed a common human behavior was unique to you and symptomatic. You're just being human.