It never occurred to me
not to change the locks. The minute I start paying rent, I always saw it as my home.
Upon viewing the place, I make explicitly clear that I expect it to be cleaned and anything that's broken shall be fixed prior to my taking possession and that I will consider the contract null and void if it's not. I ensure this is written into the contract so that if it's not taken care of, the contract is null and void the moment possession is granted.
I ensure that the landlord understands that I expect to be allowed to treat this as my home and that I will decorate to my taste for the duration of my occupation of the property.
The locks get changed the day I move in, pictures are taken to record the state of repair before furniture is moved in. I write up an inspection report with copies of the pictures attached and send it to the landlord.
I decorate as I see fit.
When I leave, I put the house back to the same state or better than it was when I arrived. If I have had to replace any appliances that didn't meet my requirements, I put the original appliances back and take mine with me. The place is left as I would expect it to be when I took possession, which is immaculate.
I take pictures as evidence of the cleanliness of the property and hand copies of these with my keys to the landlord the day I move out. This is mostly as a "You know I took pictures of everything when I moved in, and now I've taken pictures of everything as I'm moving out so don't try anything shady or you will be caught in a lie."
If the landlord wishes to complete an inspection during my stay, they can give me the legally required amount of notice so I can be home to let them in and see them out.
In the 25 years I've been renting properties, I have had only 2 landlords on short leases give me any kind of problems. I've never had a security deposit withheld. I've never been evicted and barring these 2 particular landlords, who failed to meet their obligations as landlords - i.e. fix broken water heaters and burst pipes etc. which I had to foot out of my own pocket and then go through arbitration to recover the costs, I've had nothing but cordial relationships with every landlord I've ever had.
I know there's a shit ton of bad landlords out there and that my experience has largely been one of luck given that I rented student digs too and there's plenty of landlords that prey on students who don't know any better; but it horrifies me how many people allow landlords to treat them with anything less than complete respect. It's your home, you're paying for it. They may own the deed. They may pay the mortgage company. They may be responsible for the upkeep. But it's your home. You should ensure the lease/contract allows room for you to treat it as such before you agree to sign it.