Throughout my life I've had a variety of breeds, mixes and genders. I have to say at the sum of all the personalities as I look back and current ... I can't decide. I do think there's something in the decision about whether to go with a "characterized" intelligent dog versus one that is known for a different talent -- or it could be the group of dog. Of the females we've had the most gentle, forgiving, loving, wonderful, sweet yet protective when needed was a Wheaten. The most all but intolerable was a Lhasa. The snarkiest, sneakiest, funniest, bear hugging lunatic ... my current Belgian Malinois female, Tanya. I have two other male Malinois right now, one is her litter mate, who was the largest in the litter of 10 and I think suffered a bit on getting his fair share of the gene pool. Tanya darling is very very adaptable and yet knows when to walk away. She is also very good at giving "the look" to stop either of them dead in their tracks.
Sorry guys, I have to say, unless you're a strong enough person don't get a female of a strong breed ... most men can't handle that, hee hee hee.
I also recently lost our male Great Dane, who really was a person. Great Danes are by far the most emotional breeds I have ever had, and it's so unfair their lifespans are so short. We were lucky enough to have his litter mate sister in the extended family. The combination of nature and nurther did not work to her favor -- a very strong protective female in a home with little or no training or limits did not do her personality well and she turned to the dark side simply because she was allowed to. She was extremely dominant from the get go, and when a strong, enormous, dominant spoiled baby doesn't get her way, everyone and every piece of furniture in the house should be on alert!