Circuits also tighter as I recall. You get more in for your bucks. Nice, easy circuit joining procedures.
Very straightforward procedures and a nice sense of urgency - when you've got your clearance to take off they expect you to move not sit around checking, checking and checking again - if you are not READY for departure don't say 'ready for departure'.
And you will nearly always get a radar service - they're used to handling large numbers of a/c simultaneously.
And of course, NO landing charges, NO approach fees at the vast majority of airports which are more often than not staffed by friendly, courteous and extremely helpful staff - I've had lots of hotels booked for me and freebie lifts to and from the hotel.
But their aerodynamics are still imperial - they won't use metric so the aircraft flies differently.
PS. That last bit wasn't supposed to be serious.