There's more variance with small-time landlords. With a corporate overlord you know exactly what you're getting: they are going to be firm about sticking you to the exact terms of your lease and will raise your rent by the maximum possible each year, but you can also expect any maintenance issues to be taken care of quickly and they aren't going to feud with or retaliate against you. With a mom & pop you might get someone really nice who never raises your rent, understands if you're a couple days late, and takes pretty good care of the place; but you might also get someone who is completely unresponsive, violates a bunch of tenant laws figuring you don't have the resources to call them on it, and nickle & dimes you on your deposit.