When they are enjoying it i'd say the kids.
If they're tired, hungry or the weathers bad though they can turn into a bit of a nightmare.
When we're all out together and enjoying the countryside i don't think there are many times i've felt happier.
The other one is:
Always eager to go out no matter the weather, always tail wagging grateful when we get back, never complains and doesn't talk back, so great company some times.