You mean you freehand all your lines with all your artwork? *in awe* Your amazingness just went from 100% to about 500000000% *faints*
Oh, and i do understand what you mean, though i only know how to use the pen tool, not the vector tools...or are they the same...?
I freehand my lines too, though i seem to always make them too thick or too thin or contrast too much...-_-' I need your professional HAAAALLPPP!!! xD