I love my girl, and wouldn't hesitate to get another beagle someday. I've had her since she was 8 weeks old, and she'll be six at the end of the month. She's very sweet and affectionate (IE- she'll lick the crap out of you!) and gets upset when left alone, which is part of being a pack hound.
LOVES people. Cats she's always been curious about, neither likes or dislikes them. Other dogs, though, she's always been terrified of. If another dog comes near her, she hides.
She does bay (howl) but only when provoked into it. (like, when playing keep away with one of her toys, for example.) Never has been much of a barker.
They aren't the easiest to train, and are very prone to running off. All her life, no matter was tried, mine will just bolt out any open door she can find and run until she tires out. We've almost lost her several times.
Beagles are at the top of the list as far as health, having few if any genetic or breed specific issues. They live, on average, 10-12 years.