"She asked me where I had seen myself in 30 years" makes no sense. The only logical version is this: "She asked me where I SAW myself in 30 years". 'In 30 years' means '30 years from now' i.e. 30 years into the future. This is the type of question people are often asked at interviews (though it's usually 10 years, at least in most countries). Here's the scenario: Interview: Interviewer: So, where do you see yourself in 30 years? Joe: Well, in 30 years' time, I hope to be the boss of my own multinational company. Later on: Friend: How was the interview? What did she ask you? Joe: She asked me where I saw myself in 30 years. I told her that I hoped... I hope that makes sense now.

She asked me where I (see) myself in 30 years? Ok, what are you fgoing to be doing in 30 years time, from now. You are right to question, if you had a question. The one with "had" is unlikely. What might be said is She asked me where I had seen myself in 30 years? So, "had" refers to a point in the past, understood by both speaker and listener(s). So this one would need extra to make it work, For example I had never planned to go back to school and study after I left at a young age. Now 30 years on, things are different. I see a bright future. She asked me where I (see) myself in 30 years. - as in previous to the change and study. She asked me where I had seen myself in 30 years? Had to work really hard to make that one sensible. Not likely to ever hear it.