Our last dog was a lab, she was absolutely the best dog, quiet and cuddly and not food oriented at all. Sadly we lost her early this year at 11-years old.
We have recently purchased a lab puppy - boy did I forget how make hard work it is!
I do love her dearly and I took my time to really check out a few litters as we really wanted a small lab, at 6-months she is only 15kg (others in her class are towards 20kg plus at this age!).
Her mum is extremely quiet and her dad is from working lines. You can tell that she is from working lines as hunting is her favourite game!
If you do get a lab, do try the gun training it is really great fun and labs really need to play with labs as they like to play rough!
My stuff has taken a bashing from her, my DH's stuff has been mostly untouched! She loves to raid the bathroom bin - yuck!
In terms of food, she doesn't really eat much and her interest in food has made training easier (well apart from walking to heel, she wants to sniff everything and get there at 100mph!)
Personally, I think dogs are a reflection of their owners, if you are highly strung they will be too.
Good luck!