I hated it in school and I hate it now. I know it's a good starting point for a conversation, but if the person you're talking to evades the question multiple times, it would probably be better to change the subject.
To distort some proverbs, I don't like counting un laid eggs. Even if the eggs are laid, I don't like counting my chickens anywhere but in my own head before they are hatched. The earliest time I might mention that I want to have a chicken is, when a little yellow fluff ball is standing on my hand.
I have some general ideas what I'd like to do, but to tell the truth, I'm not picky. It earns me money and I'm qualified? I'll do it. Mainly because I've no intention of settling down anytime soon, if I can avoid it. But explaining this, would credit the asking person with to much interest. So, if I say "I don't know yet.", "I try not to think about it, the idea terrifies me" or "I don't have specific plans", would it be asking for too much to just leave it and talk about the weather?