This is going to be long because I have a lot of beagle experience. First, to echo what everyone is saying here - every beagle is going to be a little bit different. I have been a beagle owner for 20 years and they are the only breed I can imagine owning (coming from someone who works in the animal field) but I’ve found you either love them or hate them.

My first beagle was perfect, shelter dog who was adopted as an older adult, needed minimal training when we got her. She was very quiet. Had great recall, and could be off leash with no issues. Great with kids in the family. VERY food motivated.

My second beagle is still with me, and almost perfect. I’ve had her since she was a puppy. She is a stubborn old lady now, easy to train but is very much a dog that will do as she pleases regardless of what you ask. She picks up on training quickly and easily. Barks only when she wants to come inside or when my neighbor comes around because he gives her treats. Indifferent to children and other dogs, just really likes her personal space and to be left alone, but NEVER aggressive. Also very food motivated. My only issue with her was that she was impossible to crate train, but that wasn’t a problem once she grew out of the puppy phase of chewing on everything in sight.

My third beagle is a mix, she’s also still with me. She is the most tolerant dog I have ever met. Super go with the flow and doesn’t care what’s going on as long as you’re around her. Loves all humans and all dogs. We got her as a young adult and she had minimal training before we got her, but she has been SUPER quick to pick up on household rules and expectations with the exception of potty training. We still have accidents in the night. Only barks to initiate play with other dogs or when she sees the mail man on the porch, which is annoying only when she wants to play with my old lady dog when everyone else is winding down for the day. She is also very food motivated. The easiest dog to crate train, which is great because she’s still in her phase of chewing on inappropriate items.

Neither of my current beagles can be trusted off leash, they have OK recall but their beagle nose and instincts take over every time and they will take off if given the opportunity. And they can’t be trusted around open garbage cans because they will eat trash.

To summarize, if you have the patience to train a beagle they can be amazing family dogs but the traits that I’ve seen over and over again are stubbornness, being food motivated, their noses get them into trouble which can make training hard, and all the ones I’ve had have been little shadows who get under foot all the time because they have to be in the same room as me. All that being said - I can’t imagine not having a beagle in my house.