I wouldn't say its necessarily a "big deal" now, but it has definitely made us reconsider our ways:
I'm somewhat sloppy/slob-y. "Typical" bachelor things, leave socks in the living room, dishes pile up for 2-3 days. My wife never made a big deal out of it, I thought it was awesome that she didn't "nag" like my mom used to.
Turns out its because she's even more messy than me. So we ended up living in a pigsty…
The happy ending is that once we decided to grow up and make a chores list. We also tend to gain momentum once we start, its just the getting started that's an issue we're working on.