For Oops I use FoldandStaple for pretty much everything
MightMakesRight is another favorite font
My handwriting is terrible however, I've always been curious about creating my own font. Maybe eventually.
I use fancy fonts in a minute. I'm really particular about the style of fonts I want to use, so yeah- I went out and bought some.
For dialogue I use http://888toto.deviantart.com/art/FREE-COMIC-and-MANGA-FONTS-261494973 these. I don't usually change the font for emotion, that's what characters are for. I bold for inflection that's about it. I'm too poor for fancy fonts.
For my comic Zoonland, I use Anime Ace 2.0 BB. Sometimes in bold, sometime italicising it. I prefer to make my characters play the different emotions through their facial expressions.I think it's a very complete font, the best I've found in years.