Had a few standards myself and honestly I adore them.
Great with children, intelligent, gentle, fun...they are wonderful family dogs. You do need to be firm with training as they're clever enough to run rings around you if you're not careful, but I've never known one to have anything less than a delightful temperament.
I would strongly recommend training classes for both you and poodle unless you're experienced with dogs. They're a large breed so it's essential you have control over them when out and about.
In terms of how easy they are to train, we'll I've had one at each end of the spectrum 😄 One of mine was blissfully easy, very biddable...The other was too clever for his own good. Dont get me wrong, I adored this side of his personality too as it came with a very human sense of humour but he needed firm and consistent training. For the first few years, he wasn't great at recall so there were very few walks during which he was let off lead.
Both temperaments were endlessly patient and playful with children and other animals.
Sadly, I don't have any poodles at the moment as my lifestyle doesn't suit one but I long for the day when I can have one again.
You need to factor regular grooming into projected costs but you don't need to maintain a clipped look the whole time, they look great when their fur is allowed to grow longer too. Typically, I planned their cuts so they had thicker fur in the winter and a more recognisable poodle cut in summer months.
Happy to answer further questions on the condition that if you get a poodle I may visit and play with it 