For me it was easy! I was given my fathers surname as my parents were married at the time, 5yrs later they divorced and my father was more out then in my life. My younger brother has fathers surname also and hates it because he doesn't want to be associated with such a low life! He has talked about changing HIS surname if he gets married.
Both I and our 2 dd's have taken on my husbands name and bub#3 will also. My husband is nothing like my father and my children will hopefully grow up proud of their surname and the family unit that we are
Their are 100 different situations and I think YOU most of all have to be confident and happy with the decision you make