I use chartpaks it has a nice flow of ink and the colors blend nice together. When drawing on paper I also combine them with prismacolor art stixx which are inexpensive and can be used for a variety of airbrush type effects.
I've even used FAT Crayola markers which give you a nice variation of line quality and seems to have an unlimited ink supply.
I'm mostly into drawing characters?caricatures now, and not so much lettering like in my young days. Check me out at
www.subwaysurfer.com