Much of what you've written here has also been the story of my life. My natural way of speaking is to choose precise words from a big vocabulary. I've been chided about this on several occasions. I definitely get a much better response when I use small words and simple, common analogies. That's easy enough to do in writing, but doing it live is very hard. I have to slow my thinking down and pause to come up with simple phrasing. Of course, other people perceive big words as trying too hard, and small words as natural.

As for the rest: yeah I don't get no respect neither.