I have a 7.5 month old show cocker, and to be quite honest he is clever enough that I would be rather scared of having a cockerpoo! (Poodles are v.clever generally as a breed).
On the other hand he is totally a Velcro (clingy) dog and I think most cockers and their derivatives are. He hates being left in the house on his own at all, so he comes everywhere with me - luckily he doesn't mind waiting in the car! - and isn't too destructive if you don't count his love of my bras which get removed from laundry baskets and taken to his bed to be sucked
We are on a list for a cavalier in the autumn - they are bred to be "lapdogs" but this means that they too love their humans and get distressed if they don't see much of you.,
I had Labradors growing up and as the first dogs for our family - I got them when I was 3 months pg with my first DC. They are wonderfully natured but are still puppy like until they are 2 or 3. And a 30kg 'puppy' having a mad half hour is something to behold.
No one has mentioned health testing yet as far as I can see, and for the breeds I love (spaniels, labs, gr) it is absolutely paramount.
Labs and Golden Retrievers are susceptible to hip dysplasia - a genetic hip problem which can, in the worst cases, render them unable to walk. The parents should be 'hip scored' and preferably under 10 in total (you'll see the scores like 5,3 for example.) you also want the scores to be roughly the same each side so 9,2 isn't as good.
They can also get elbow dysplasia, again should be tested for, but can also be as a result of excessive exercising when they are young.
Cockers Spaniels should be FN and PRA-prcd genetic tested. Cavaliers should be tested for Syringomyelia , eyes should be cataract tested and MRD tested and they can have heart problems too - MVD testing is important.
Now I have written an essay - sorry! Having dogs in my life makes me ridiculously happy but I do put them above myself in the pecking order of needs (ie if I need a wee and they do too - I let them out first). My v.elderly lab is quite capable of deciding that she needs a wee at 4am and I always get up if she needs me.
Wouldn't swap them though!