I got a few brush type pens but my favorite was the UniBall Signo bit 0.18. It makes a nice juicy line and I love how the ink flows!
Here I am working out the line art. Once that is done the drawing gets scanned in and color and pattern added in Photoshop. I can't show you the finished illustrations yet ... but as soon as the magazine is out I'll post a photo.
I usually prefer to work all by hand but when doing illustration it is so much easier to work in Photoshop so I can quickly make changes. I still haven't been able to switch to drawing the lines on a tablet. So instead I draw on tracing paper which scans in nicely.
I still love my Faber Castell Pitt pens for doing ink work on top of paint and canvas, but it was fun to try something new for drawing on paper!