Mine are always awful and usually involve a gas leak.
My first home, moved in and had a bit of a housewarming. Strong smell of gas noticed, boiler was leaking. This was a brand new house.
Moved to new house, boiler condemned. Despite having had an in depth survey there were issues with the roof and loads of other problems. On moving day, discovered I couldnt get the sofa through the front door due to the angle. New next door neighbour stood on drive giving me a load of rules about parking and moaning because I had a cat.
Moved again, renting this time, new build house left beyond filthy by previous tenants. Landlord was mortified, though clearly didnt check it very well. Fridge and freezer full of rancid food, dishwasher clogged up and turds down toilet. Not quite sure how that got missed. He did offer to get a cleaner in but me and my mum cleaned it.
Moved to current house, gas leak from a fractured pipe. Spent my first night sat in the cold, gas turned off, waiting for gas man to come out and sort it. This was hotly followed by numerous plumbing issues, including hot tank overfilling and pouring through the bedroom ceiling.