Odds are this is not the last house you will buy. One day you will use what was less than perfect about this first house to figure out what will be even better about the next house. (Each house is one step closer to the eventual "dream house.")
Don't get sucked in by decorating, good or awful, they're taking it with them when they leave, and paint is pretty cheap.
Hmmmm How about "Why in the world are you settling down now, when you could be out having adventures and visiting Lulu in Bangladesh?' or maybe I would ask about flooding, which was a constant issue in my childhood home as we lived on the lowest property on the block and everything drained into our yard.
When you do buy, make sure your mortgage company is very clear on what is or isn't rolled into your mortgage payment. We were given the impression that our association fees and insurance were being covered and found out the hard way they weren't.
Thanks wise ones! There is so much damn info to know. I realize there will be something we overlook and it will have to be a learning experience, but hopefully not a Tom Hanks staring through the floor of the second story, laughing maniacally kind of learning experience.