My favorites all have as few syllables as possible, I think that probably helps. "Home", "Mom", "work", "workout". For non-favorites I usually navigate to interest point like petrol stations or similar. Addresses and city names are a
problem though, since they're all danish and I prefer english voice commands.
It has no problems recognizing what I'm saying. Maybe it's the lack of a dialect? Being british might be playing tricks on the recognition software
I like how the triggers phrases can be different too, "
plot a course for ..." - "
navigate to ..." - "
take me to" etc.