I have a Springer and a working cocker. The cocker is 9 months old. I simply adore him, he lights up my life. He is the most gentle, timid, sweet natured and loving little soul.
He came from very strong working stock, his parents work in the field and pretty much all his generational relations too. He's about as calm and laid back as they come.
He's currently got a broken leg as he was attacked, so hasn't walked at all for nearly two weeks. It hasn't made any difference to him, he's just as placid as ever. However, we do plenty of training and mental games to keep him stimulated and feed him using Kong toys etc.
Bright as a button and easy peasy to train as they so want to please. Makes the Springer (who is no dummy) look thick in comparison.
I honestly think though that, while there are traits in every breed, you will get 'mad as hatter' dogs of all different varieties, and calm dogs too. That being said, the Springer is very calm too. Caveat as above - we train them quite a bit (nothing more than a few minutes at a time, but enough to stimulate and tire them) and do quite a few scent work type games while out.
Both spaniels get two good walks a day, but both survive on much less. We just have a busy active life anyway so it fits. They both will take as much as you give them.
Also, these are my first two dogs, so I don't know if they are hard work or not iyswim? They don't seem like it, but I expected them to be busy and active. If I had another dog, I might be able to make a comparison.
Average shedders.
I would have a working cocker again, and again, and again 