Ehhhhh, very dependent on life stages. At my age do I have much of a five year plan? Not really, but I also don't have a lot of wants. I had a house before, not really a goal now, marriage-if the situation is correct, kids-doubtful.Most people suck at being desirable life partners and mainly because they've never done it before. This goes back to my point of people having an idea of how marriage should be without ever having experienced it for themselves. You can't believe in "happily ever after", while judging a person's worthwhile on who they are today. That's contradictory. With that said you shouldn't be looking to change anyone, but value those who want to change themselves. It's a cliche question, but the answer to "where do you see yourself in 5 years?" can tell you a lot about a person.
Point being that what the person asking the question on the other side wants to hear could color the response they hear negatively. That questions asked like a job interview question, ehhh. Much better for a running conversation.
I'm rambling..................