Bloodhounds are huge, drool a lot, and are smelly. Their ears require a lot of care and they can be noisy. Not a dog for the casual owner.

I've heard retired racing greyhounds are surprisingly sedentary. The ones I've known have been hypersensitive but not hyper. They don't slobber and they apparently are much less prone to bloat than most large breeds. (Not for WLD, who seems to have decided against a dog, but in case anyone else cares.)

Really, I think that if you don't really want the dog, the stress of owning it would outweight any potential benefits. I actually enjoy my dog.