I like dogs and they are a great ice breaker. My wife is scared of large dogs. She has learned to trust certain large dogs and prefers the older ones that don't jump on you. My wife is a cat person.
I'm kind of like your wife....afraid of big dogs, particularly German shepherds. Though I really really like Labs and Great Danes.
I've had 4 Westies though, and would have another in a heartbeat, but other half thinks dogs only belong outside, and I think they belong inside. It's been an ongoing battle for years and until he realizes that dogs in his prior "lifetime" weren't properly trained, there won't be any more dogs here.
We do have 3 cats, and he suggested the other day we go to the shelter and get another one.
This from the man, who 19 years ago when we started dating, detested cats!