Every Pilot likes it different.
Okay, normaly the Pedals are not changeable in the Helos i know (350, Lama, 206, H300, R22, R44 etc.)
But the Cyclic and Collective are, and some Pilots want a little bit friction and some not...
Its like IconRipper said... Do what you want, It needs a "little" bit, you should feel that you push something, but not that hard.