Howling:New Cycle

Now that the doctor has a new regeneration cycle, do you think each incarnation will be similar to the original cycles ones? What I mean is since 12th doctor seems to be quite similar to first doctor, is this a consequence of the new cycle or just coincidence. Two examples are they look same age physically and the 12th doctor is apparently going to be a no nonsense doctor, which reminds me of the first doctors personality.