@kdfrawg I avoid fancy, but embrace visual aids. They help me make sure that I haven't forgotten a closing bracket or something like that, and in the case of Markdown/LaTeX, means that the markup stuff visually blends in with the background and leaves me to focus on the content.
I think the only "fancy" thing I have enabled is relative line numbers in vim, which makes the line number column display how many lines away from the current cursor position something is. Good for the text manipulation commands.