We'e expecting our first in early December and the only advice I'd give is never say never....
...for many many years I never thought I had a paternal bone in my body but then even as late as your mid-30s (by when you kind of think you'll have it all worked out!) things can change. I'm genuinely looking forward to it - bit daunted especially by the really floppy headed new born thing.
The only thing we're struggling on is names if its a boy - Vybik Locodogz just doesn't scan......
Oh and Jane - I'll put you down for baby-sitting duties then......kidding!!!