I don't think personality has a corellation with interests, at least not in CoE. I know there is the RL stereotype of introverts being the artistic and/or intellectual type, and extroverts being the sporty and pyhsical hands-on type, but I think it unlikely that they'd carry these stereotypes into CoE, and if they do it'd be in a way that you could either;
a) ignore them for your own pursuits without penalty,
b) are able to encourage your children towards the personalities, and also pursuits, you want them to have.
c) have the personality as part of the customisation settings that are open to you between lives, even if you are constrained by the parent personality genetics when doing so - making it very important factor to consider when making child-contracts (actually, I do believe this last one is the way it is planned as I seem to recall choosing and adjusting personality traits being mentioned in the dev journal about starting a new character).
Having said that, i have often mused that it would be amusing watching the disparity in personality between the PC and the OPC. Imagine the jovial happy-go-lucky PC you adventure together with turning into a crotchety bull-headed OPC whenever they log off.