Just like with cats, I can't really choose a favorite...but, let's just stick with ones I have never had that I really like! (so I'm excluding labs & dachshunds simply because I've been lucky enough to have been loved by one of each)

hmmm....

Airedale Terrier (my husband loves them and if we can, that'll be our next dog)

Bull Mastiff

Scottish Deerhound

Norwich (or Norfolk) Terrier

Great Dane