Digital BW, The Print

Hi
Just looking for some information. I have recently bought myself an 
Epson 1160 printer with MIS FS-N ink set and PiezographyBW. I am 
really impressed - I think !! The pictures seem to have a real sketch 
quality, some more than others. I have been using Epson archival matt 
and Hahnemuhle "Photo Rag" papers. The achieved tones are brilliant 
and pictures are very sharp, but very graphite-y. Is this sketch-like 
quality down to my Black and White conversion and subject matter, or 
is this just the nature of the beast? I'm not saying it's not 
attractive, but I showed it to a friend today who's a real dark-room 
officionado, and he was well impressed, but without me even 
mentioning the sketch quality, he made the same observation 
(admittedly, he's not used to such a flat matt look). Is it worth 
trying any other paper to get that 'dark-room' look, bearing in mind 
that with these inks I can't use glossy paper?  Or change my 
technique? Or do I learn to love this quality?
Thanks for any suggestions.
Regards
Kirk