Hi Marco,
that's fairly easy, as my two favourite shapes are also the best ergonomically and feel-wise that I've come across - the Modulus 6 string bass that I play, and the Sei headed flamboyant 6 - see
www.seibass.co.uk for more on those.
I also really like and feel the look of Geoff Gould's basses, Zon basses and the MTDs. Heck, there are loads of great looking and feeling basses out there, but I'll stick with Modulus and Sei as my two faves...
cheers
Steve
www.steve-lawson.co.uk