If you adopt a greyhound from a good adoption group, chances are it's probably illegal to allow your dog off-lead in an unfenced area. Most, if not all, groups have a contract that requires you to keep your dog on a leash unless you are in a securely fenced-in area. No buts ands or ifs.

It's not necessarily true that all greyhounds are aloof with strangers. In fact, the contrary is true. One of the main reasons greys tend to make such wonderful therapy dogs is because they LOOOVE humans. They love ear rubs, kisses, hugs, and gentle pats. They live to be fawned over. Giselle has never met a stranger. Everybody she meets is an instant friend. However, these dogs are not Golden Retrievers. They show their affection in a much more reserved manner. They're also much more sensitive. There are many "spooky" or shy greyhounds and they take more time to trust a person, i.e. allow you to pet them. To the unexperienced person, this might seem like "aloofness". In most cases, it's just a normal part of greyhounds and their sensitivity.

For recommended reading:
Adopting the Racing Greyhound by Cynthia Branigan
Retired Racing Greyhounds for Dummies by Lee Livingood

As was mentioned previously, greys need comfy beds. Most often, this means your couch. Greys have funny ways of sleeping as you'll soon find out, so I would not recommend forking $100+ on a fancy schmancy bed. Chances are your dog would much rather sleep in the cat's bed. Case in point:


But since you asked about character, I'll answer accordingly. Greys, in a nutshell, are pure lovebugs. They're mellow creatures in the house and they love to be loved! They're large, goofy, sensitive dogs. And at the end of the day, there's nothing like a wet greyhound schnoz planted firmly on your lap.

Btw, is there a reason why you say "borzoid"? Is it an inside joke or something? At first I thought it was a typo, but now my curiousity is peaked