I must defend Notepad here. I enjoy having a simple text editor included on my machine that doesn’t try correct words or style anything. I often paste text from Word or Google Docs into Notepad, then paste into a WYSIWYG editor simply to remove all the inline span tags and other crust. Comes in handy when training others how to WordPress, for instance. TextEdit, on the other hand, is a rich text editor and gets in the way for this use case.

What's wrong with "the regular old command prompt"? It's served me well for ages.

Kind of weak line editing capabilities and annoying script compared to the alternatives. I'm a PS fan though.