I average 360 - 420 on a tank, really does depend what type of driving that involves for sure. Most i've had was 450ish when driving as smooth as possible.
Personally always quite enjoyed looking at the MPG and look to improve it, helps make you a better driver on public roads i'd say too, anticipating more etc.
Interesting also how the range of these things don't really change over the years as I was regularly getting north of 400 from a tank in my mk2 Golf GTI 8v and mk3 Golf GTI 16v.