I have a question. Is it considered rude to ask a provider about their experience in the industry?  Also ask things like What was your craziest client requests. Maybe some other type questions as well.

Probably not the first time you meet.
If she's a regular and you're comfortable with each other it's not an issue. As long as the questions come off as curious and not judgmental or condescending.  
 

i do not mind those type of questions
better than questions like "does your family knows you do this?"

I get that a lot...I don't mind...

In my case, I am genuinely interested in each provider as a person, and I find sex workers absolutely fascinating.  That being said, I wait until I've seen a provider a few times and we have a comfort level.  If you're interested in asking, and she's interested in sharing, your conversations will eventually head in that general direction.  My ATF and I are real big on that.

If she is the type to open up and tell you her life story, then so be it.

Im very upfront and have ots of funny stories to tell from so many years in this industry,
Of course I would never give away personal information on anything to even hint at who is involved in the stories.. they are just general.
Like: "one time this guy asked for (insert funny stuff here)"
But I don't consider that a breach of confidentiality.

go a long way to enable any conversation.

I personally, have no problem answering questions like that but you have to ask it, #1 in person and #2 appropriately...i.e  
So Roxanne what was the craziest thing you ever did? vs. tell me play for play how many men you've been with and how he did this and that....

I'm going into the room with a fucking muzzle

Thanks for all the responses.  Most of the responses seem to be that it depends on the provider. I was curious but did not want to offend or make the provider feel uncomfortable. On my side my curiosity is just for sociological knowledge.  

She is awesome.

You can ask anything, but know she is free not to answer or may lie.

I am seeing this lady now for a few months. About two months ago her P411 account is not active anymore. Her web page went off line a couple weeks later. I have seen her a couple times sense then. I do have appointment set up with her in a couple days.  

sometime I feel they they regret opening up that much.  
Has this happened to any of you