Much as I'd like to, 50 years of understanding exactly how fast 60 MPH is means I have to pause and think about a little mental conversion when I see kph
Right after I posted, I realized I should have included a 'sarcasm' tag. In my example, I made mention of someone doing 45m/s in a 50kph zone to show that even to an engineer like myself, velocities in terms of meters per second are never mentioned in 'real life'.
(That 45m/s is about 100 MPH, obviously much more than 50kph)
I'm the same as you though, I've tried switching all the gauges in my car and GPS to metric units to get me into the 'feel' of how far a kilometer is, but it's been about 6 months and so far hasn't taken.