Ok, I don't have the time to write a long proposal (or even think of one) right now, so instead I'm going to try to propose a Framework in which these goal can be understood, that will hopefully lead to Theon being a somewhat balanced person.
I think there are 3 types of goals, of which we should each have one. Political, Inter-Personal and Personal.
Political would basically be what we want, in relation to the greater game of thrones, so something like these:
[] (Strategist) Win the war for the Starks.
[] Rule your own mainland territory.
[] Sit the Driftwood Throne.
Then there would be Inter-Personal, which would basically be what Theon aims for in his relationship with other people. I don't think this would just influence one or two individual relationships, bit will probably be an influence, major or minor (depending on the person), on how he interacts with anyone, at all.
Think of these:
[] (Furious) Make Balon pay.
[] Reconcile with your family.
As well as the frequent option from other, similar quests, of:
[] Find Love
And the last one would be Personal. So basically, the start of an answer to the question "Who is Theon Greyjoy, if we wasn't Theon nor a Greyjoy". What does he want in the privacy of his own mind.
The only one of the proposed options would be:
[] Carve your name into history.
But some things like the following would probably also work:
[] Write a Complete History of House Greyjoy
[] Travel to all the Seven Kingdoms
[] Visit Essos
[] Built the Greatest Ship to have ever Sailed
[] Become really good at Pottery
[] Become the best Archer in the 7 Kingdoms
[] Find something to fix your Eyesight
(Btw, I'm not asking for approval for any of these, it would be kind of mean towards Husr to ask him to review 8 options at once, they are mainly just here to serve as possible example)