I've had four working springers and DH has had many more as he grew up with them. I love the breed, but by god - the energy! Current lad is ten and nowhere near slowing down.
I've noticed that the two we had from eight week old pups have been a delight, bonded to us, trained easily and were loyal and loveable. The one who came to us at 16 weeks was gorgeous and had a lovely nature, but she could be a bit of a diva, was very greedy and had zero recall. However, she walked beautifully on the lead and was oblivious to other dogs so outside she was fine. The rescue one who we got as an adult was a bossy nightmare who thought she ruled the roost, had no recall at all and was quite frankly a pain in the arse.
The female we had from a pup was lovely, really sweet and cuddly and great with kids, but she had a very strong prey drive. I once watched her catch a rat in the garden, it wasn't pretty. If she got the scent of a hare out on a walk off-lead she'd be off like a streak of lightning.
Current boy is a dream dog, the best ever, loving, cuddly, clever, obedient and his recall is incredible. He can be a field away, but one quick whistle and he's by my side. His only downsides are that he is a velcro dog who wants to be cuddled all the time, and he hates walking on a lead. DH takes him up the mountains where he can run loose, and every walk has to end with a swim as he's a mud magnet. He'll be our last, he's irreplaceable and we are getting close to retirement and want to be able to travel at the drop of a hat.
As for breeds I wouldn't have - quite a lot. Chihuahuas have to be at the top of my list, I like dogs and they usually love me, but it's been mutual loathing with every single one I've ever met - yappy, snarly things. Beagles, just based on the one my neighbours have because it never stops barking. My friend has a cockapoo, which is quite simply the most neurotic dog ever and thick to boot. I wouldn't want a brachycephalic breed for the obvious health reasons, and I would never have a staffy type because if they want to hurt you, they can.