Not a dig at you, but I tend to use $5 words when a normal word would suffice. Even though the obscure words usually express my thoughts more precisely than common words do, they do a worse job of conveying understanding, since people often do not know the word and infer an incorrect meaning from context.
I try to communicate at a level where the intended audience can easily understand me. This is also partially out of laziness. I don't like having to repeat myself.
