See what you have have basically a cross between Labrador and great dane so its vey unlikely that the dog is going to act exclusively act like labrador pup.
It fact what comes out will be there to know after a year or so.But yes since both the breeds (i.e lab and den) are loving and caring i think the Pup will be loving too.
And if you love it.Dont think! Take it.Theres is no love like dogs love because its so unconditional.
3 Cheers from me to adopt the dog.