I have a noticed a huge preference for seeing providers in private residential locations vs hotel environments. Aside from safety reasons, why do you prefer one over the other? Does it matter to you?

When traveling, it doesn't matter as much as long as the providers are at upscale hotels.

I think I feel safer in a mid to upscale hotel vs residence unless I know the provider is highly reviewed and established.

..as long as it is spacious and clean.

safety issue.  LE busts are almost always set up in a hotel room, not a private residence.  I also have concerns about the traffic in and out of the room and towel usage attracting the attention of hotel staff and other guests who may view such things with suspicion and take action.

Nosy neighbors could be a problem at a residence. Same could be true at a hotel, if it's a small slow hotel with a tiny lobby.  
A residence could be in a bad neighborhood, but so could certain hotels, so it's not residence vs hotel that is the issue. It is the location and type of residence or hotel.

...but given the choice I prefer private residences as long as parking isn't a problem.

Totally neglected to think of that.

I had an ATF who worked out of her home, and neighbors called LE complaining about the men going in and out.  LE set up a sting and eventually got a warrant and raided the place, arresting 3 ladies.

I believe that would be considered a brothel. No wonder the neighbors noticed.

They should have a car with limo tint pick up clients from remote location, come back into garage, so neighbors don't see.

Either works for me, with a moderate preference for hotels for incall that are somewhat busy and have a place where one might logically hang out without looking odd.

I prefer residences because it is none of the neighbors business who is visiting.  Whereas a hotel has a vested interest in knowing who is coming and going.   So I feel a lot more comfortable visiting a residence such as a home or apartment

People I have seen in residences have often warned me about various nosy neighbor situations.  I've heard this in apartments, condos and even single family houses, I guess it depends on the neighbors and how much time they have on their hands.

If I was sure that the residence is the ladies alone and that nobody else lives there then yeah, residence. Problem is there is not even a single time that I've been privy to ANY information as to what SO, BFF, or family member may also live there or be staying there. Vested interest was mentioned, well it gets no more vested than when you are face to face with someone in their own home.  

Wow.... This right here is why its hard to find a great residential location.

This is how my location is, wouldn't have it any other way. Oh and there MUST be an intercom/buzz feature to add to mystery.

....I always choose a "home" incall vs hotel when im home...if provider is on the road,thats different-but if shes local I always choose "home" first...why?...because most locals doing incalls live where they see you...(gee is that a butter stain on that pillow case?)-YUK!-once bitten,twice shy