Rideitout, if your wife sees a man she wishes were taller or thinner or had wavy 80s rock star hair when she looks at you, she's not worth your time. If she's focused on those things, she should examine why they mean so much to her. She should be seeing your qualities with fondness and gratefulness - the way you smile or your sense of humor or your fidelity and grace. She should be seeing a man she wants to grow old with.
But that is NOT the question that was asked. The question, as I understand it, was a general "Are thin people more attractive to you RIO than overweight people". The answer is yes. There are no qualifications needed, that's the answer to that question, full stop. Now, yes, maybe we can pretty it up and try to get at the REAL question she was asking (which, IMHO, the OP did a decent job of), but the question she asked is very, very easy to answer, yes, in general, they are.
I don't think that those things mean very much to my W. I use it as an example primarily to illustrate the point, not because I think it's important to her. However:
The money/income question bothers me. Is it that you think she wishes you made more money or you wish you made more money? You seem middle/upper middle and comfortable financially. What does the income represent or provide emotionally? I have my own issues around money and came back to SI to try to sort through them with a post, so I'll stop this T/J.
This is a great one to draw the analogy. Are "richer" men more attractive? Yes, of course they are, you take two similar men, one rich, one poor, and you put them next to one another and ask women which they'd prefer. I'm sure the answer will shock nobody. And that's kind of like "thin"; it's not intrinsically "right" that thin is more attractive, anymore than it's right that 6'5" is more attractive or anything else. But it is.
But I think that income is probably the best parallel to draw here, it's under my control (I could make more if I worked harder), I know my wife finds it attractive (as do many), and, if I asked her (assuming her AP had more money than me) if that was "attractive" to her, of course I'd expect she'd say yes. What does it represent? Well, whatever you want it to; it's completely fungible. A garage full of cars and motorcycles or a closet full of designer clothes. A lifetime of travel and excitement or a lifetime spent pursing solo hobbies. It's basically any material dream you have, wrapped up in a number of 0's behind your net worth. Now, that said, it's not in anyway a necessity to happiness, and, honestly, a lot of people chase it forever and can't seem to find any happiness from achieving wealth (just like guys might spend a lifetime chasing thin girls and never find someone to marry). But it's pretty darn obvious that "richer is better" in most ways; I mean, come on, it's not like I'm the only one to notice this, a comedic foil for, well, as long as I've been alive is "But he's rich" (to convince a woman to date a guy she's not interested in).
Anyway, sorry for the TJ, but I do think that's somewhat in the line of what the OP was asking about. If I asked my wife this question though, I'd expect her to be honest about my balding crown, my moderate income, my average sized penis, or any of the other things I asked her. Honestly, the more emotionally charged the question for me (penis size, for example) the more critical honesty becomes.
As I've said before, to the OP, I'm expressing my viewpoint here. You've gotten a lot of people explaining to you how what you did was wrong and how to make it better in the future by changing the answer. Listen to them, not me. It appears that type of answer would be much better received by most than it would be by me personally.