editor
hiraethified
There's some lovely looking programs on Mac OS. I'm still stuck in the dark ages with my hugely flexible but beastly looking Palm/XP Note Studio.Oh, I forgot Things. If only it was scriptable, it would be perfect.
Also I do enjoy using Circus Ponies Notebook even if it has no circus ponies in it. I used to enjoy using Yojimbo but unfortunately it became (a) too slow with lots of tags and (b) too annoying to manage project information in.
It's important to like your basic note-taking and project tools; if you hate them, you're not going to be very efficient and you'll just get confused about what you're meant to be doing and why.