I am in the middle of making the jump to better art supplies and aren't sure if I need drawing ink. If I buy I'm pretty sure it will be Windsor and Newton or a similar quality brand.
Right now I have some calligraphy ink and a pen that I really don't use. What I do like to do is some water color, water color pencil, graphite wash, stuff like that. I have some Inktense blocks which work like water color pencils but when they're permanent and can't be lifted. Oil painting has been in my past so I understand thick opaque stuff too. I also work with wax based color pencils and other products.
What could/should I expect from drawing ink? Is it opaque? I don't work very big so it's not about coverage but what I can get out of the medium.