Given these two:
- I’m seeking a position in which I could score many goals.
- I’m seeking a position where I could score many goals.
Which one is better than the other?
IMHO, the first is better. Assuming you are talking about hockey or soccer, I take the sentence to mean you desire a position on the team that allows you to--or puts you in the position to--score goals. Yes? Lately, I've been noticing people using where inappropriately. For example:
Jim: Hey Bob, you're a lawyer, right? What is equitable estoppel?
Bob: Equitable estoppel is a doctrine where a person is prevented from asserting a particular defense or raising a particular issue because it is unfair to allow the party to do so.
My point: Bob should have used in which instead of where: "Collateral estoppel is a doctrine in which a person . . ." (or, "Collateral estoppel is a doctrine that prevents a person from asserting . . .).