Personally I think it depends on the circumstances, if it were me and my children were going to see their dad & he was active in their life then I would give them his.
If he was nowhere to be seen they would get mine.

i tend to agree with this. tho i hated having a different name to DS before DH & I got married.

i manage ok with 2 alternative spellings of my given name. its spelt differently on my birth cert, marriage cert and medicare stuff than anything else so you can have one thing on the birth cert then something different for everyday use. or you could have your last name as a 2nd middle name? i know a few people who did this.