Bolding, Italics and fancy fonts are nothing but useless fluff designed to detract from the text contained therein.
And WordPad sucks for anything other than text-writting as if you copy-paste from some other app, it keeps the font for the text you've pasted. So you end up with 40 different fonts throughout the document.
It also has all kinds of useless junk like line-break characters and crappy character formatting that needs to be removed if you're using it for coding.
NotePad does what it's meant to, it writes in all fonts, sizes and languages without any extra frills. It's like a nice, strudy AK-47 compared to some fancy laser-guided American piece of **** that explodes if you fire it in wet weather.
NotePad > WordPad.