Oh i see.. 
For me, I prefer voith habits, especially TIB1218R. 
Is it because of the whistling sound that makes you like
them?
I prefer ZF but there are some exceptions.
SMRT Citaro- I prefer the voiths and SMB136C rather than those
ZF ones.
Wrights- I would still prefer the voith even though it's kinda
slow...
DM3500- I love the transmission!!!
For bendies I like the ZFs.
The habit's ZF had been part of my childhood since I was 7, now
I'm 13.
