hmm... for a non mixed family, u marry tamas from the same family type.
example:
smart family with smart family
cheerful family with cheerful family
and so on.
and when u get ur family plaque, remember when u bond, always use the options:
smart 1st option
cheerful 2nd option
easygoing 3rd option
tamas bond every even hour.
so, set the time to 9.59 11.59 1.59 3.59 and 5.59
remember that its not always that ur tamas could bond.
hope i helped