Mr. Fun is a very smart man; he's been trained well throughout life not to point out negative body parts on women.
LOL!
I'd change my tummy; I'd take a few inches off of it, and make it flatter.
Whenever Mr. Fun sees me naked, he just admires me and says how much he loves my body. However, to answer your question, he would like it if both of us were more fit and therefore, more healthy. Keeps us feeling like youngin's, ya know? So, if I were to ever achieve the allusive flat tummy, he'd think that was hot, too.
The only thing he's weird about is me coloring my hair. I see more and more gray, and I'm VERY tempted to highlight it or color it (my hair is a medium brown color). In fact, I have an appointment next month to have my hair highlighted, and he's all but talked me out of it. He says he likes the texture, and he's afraid it won't feel the same if I start coloring it.
He also says that he can't see the gray, but I know he's not THAT blind!
So -- I'll comply. But, there will probably come a time where what I see will disturb me enough to color my hair anyway.