Being a fast healer is a great thing, for sure. Great feature to have, you are fortunate.
Having a great immune system, not so sure... I have a very robust immune system, never seem to get sick, etc. but my dr. said that can come with a cost, as later in life a super immune system can turn on you and the auto immune stuff can happen. Genetics play a role, too.
Autoimmune diseases may be side effect of a strong immune system