What to get bulldog or bull mastiff opions plz?

That all depends on your life style, how much space you have, and how much time you can give to exercising it. Both breeds tend to be pretty laid back but the bullmastiff will need a little more exercise & space. Bulldogs tend to have more health/breathing problems and that should be considered in your decision. Do lots of research on each breed & meet a few & talk to there owners and pick the dog that best fits in your life style.