I think that is a complicated question, especially as someone who loves psychology. Behaviourists would argue that yes your family does shape your personality. You grow up with them and learn to enjoy the things they do because your exposed to them more often which could create this 'boring' personality. However this is not always true. You always hear of the black sheep of the family who doesn't enjoy other family activities. I honestly do believe that your family controls alot of your personality in the early years but as you are exposed to new people and experiences, it adapts. However, whether it is a boring personality or not is decided by you. If you want to seem more 'cool', start by examining and working out what 'cool' people enjoy and how they act. Then try to mimic those attributes. If they feel comfortable for you, then great! If they don't then they just arn't for you.
Remeber that being boring or cool is subjective, there is always someone who will find you interesting and same way someone will find you boring!