Have owned Bull Terriers for 10 yrs.
In fact the Bull Terrier was developed just a few miles away from where I grew up and still live, in Birmingham, West Midlands.
Currently have a 3 yr old male rescue we adopted, had 'Rudeboy' 2 yrs now.
To me they are a great breed. But they are not really a dog for most people who just want a pet. You should definitely only get one if you have owned dogs before as they are notoriously hard to own for novice owners.
When most people ask me about getting a Bull Terrier I recommend getting a Staffy - much more likely to successfully fit into a family environment.
As with any breed it is important not to generalise too much, as within each breed the dog itself's temperament, behaviour etc can differ dramatically from one dog to the next.
As for the Mini Bulls they actually share identical characteristics as the standards do, only being physically smaller of course. But there is no difference in temperament or health or anything else, unlike with other breeds that have standards and then deformed mini and toy versions where they have been genetically mutated.
In fact true ethical breeders of Mini Bulls put smaller standard dogs back into the mix every few generations to avoid these complications and keep their line in type with the characteristics of the standard.
As for their health I have always found them to be as solid a breed as any. And stats will back this up too.
Its a common misconception that because of how extreme the Bull Terrier looks that it is poorly bred, overly bred, and has all kinds of genetic defects.
Their hip scores are very good for a Bull breed and their life expectency is about 12 yrs, which is also good for a breed of its type. They are not without their health problems though and are known to suffer from mild epilespy, skin problems, and deafness - though I believe the latter 2 are a problem with pure white dogs not coloured dogs.
They are generally healthy dogs providing they are not the offspring of two white parents.
This should never happen with an ethical breeder and can only produce pure white dogs, whereas matings between white and coloured or coloured only dogs produce dogs of all colours including pure whites.
There are two types of standard Bull Terriers if you are into the whole show thing scene - personally could not think of anything less relevant, but anyway, the two catergories are white and coloured. White Bull Terries have pure white bodies and can have any colour head markings. Colours must be less than half white and more than half their coat must be black, brindle, fawn, red - there are no blue Bull Terriers.
As for the patch on the eye being a precursor to any health problems sorry but that is simply untrue.
All white Bull Terriers should have another colour in their genes and this normally presents itself as a marking on its head.
Sometimes this is a large patch on the eye, sometimes it is a tiny fleck hidden inside the ear, vitually unnoticable.
The health thing, as far as I am aware, is purely down to the white dogs suffering from lack of pigment, which is normally only a problem when mating two pure white dogs together which produces dogs that lack pigment. Whether these could have head markings I am not sure, but a white dog with a head marking is potentially as healthy as pure white dog and a brindle or fawn etc.. wow I rambled.
They also do shit Like this