Before anyone thinks about getting a designer cross breed, look at the parent breeds.
If there is literally anything about say, poodles, or cocker spaniels that you do not like - do not get a crossbreed of the two.
Crossbreeding is NOT like mixing paint, whilst some may turn out a nice even mix of the two appearance wise or behaviour wise, its rare that they actually are and frequently pups will turn out much more like one or the other.
There are no guarantees on behaviour or coat type either.. and no solid way to tell at 8 weeks old!
Cockers are busy, active, clever dogs that are nose down, bum up a nd whizzing all over the place.
Poodles of all shapes are clever, active, busy dogs as well, slightly less inclined to whizz around than the spaniel.
The crosses produce very attractive dogs for the most part, I have seen some odd long bodied short legged less attractive versions occasionally but I am sure their owners love them.
They are also very active busy dogs that want a LOT of training and entertainment - walks are the bare minimum, lots and lots of fun training, brain exercising games, puzzle solving, every single day.
They are also not remotely good at being left home alone, this will take work from day one in building confidence, building security (ie, not leaving them alone to deal with it) until they show you they are brave enough to make independent choices - this may mean not leaving your dog for 6 months or more (I would recommend no one leave a dog unsupervised, before that, and no one should leave a dog longer than that dog can cope with either and it takes a while to figure out how long that is).
Currently 90% of my clients are cockerpoos, for seperation related issues.