My last landlord didn't raise my rent for seven years. I was thankful until I moved out and he still hasn't been able to re-rent the place after two years despite dropping the rent by $100. He just didn't want to risk losing his prize schmuck lol.

What I most hate is landlords who put an automatic 5% (or whatever) increase into an auto-renewing lease. It's bullshit because their mortgage generally isn't increasing like that.