From my perspective it comes down to a few factors
1. Risk – what are you risking personally by having your own personal financial assets at risk. If you get sued are you risking alot
2. Long term plan – if you are trying to go into the rental business for a long time and may own multiple properties, long term protection feels like a good idea to me.
3. How much personal info do you want your tenant to know?
I personally have gone both ways and had no issues… because I had no issues. I think for future properties I will probably setup 1 LLC to manage multiple until the total assets are too high to risk 1 tenant going after all of it etc.