I had a past life regression session and I was  a slave in each of my past lives why would I choose a path like that?

Who says being a slave is necessarily "Bad".  In many cases it beats being dirt poor and starving to death.  So long as you have kind masters who feed and house you----It depend on WHERE and WHEN you were a slave, and what work you did. 

What you did in the privacy of your own bedroom in your past lives is none of my business.

Don't forget the safety word.

Past Life Regression is pseudoscience. 

"The use of hypnosis and suggestive questions can tend to leave the subject particularly likely to hold distorted or false memories.[4]" https://en.wikipedia.org/wiki/Past_life_regression 

I'm not saying anything one way or the other about reincarnation, but I'm very skeptical about what you're talking about. My guess is that you came up with these ideas under hypnosis and false memory has been shown to be something that can happen with hypnosis. For example, a hypnotist can prompt someone to invent a story with a leading question. If the question is, "Think back to New Year's Eve - did a flying saucer land in your back yard?" the person is liable to invent an alien abduction story.

I don't think any slave chooses to be a slave.

Also, pass life regression therapy is pure bunk. 

For a long time, we are held down spiritualy. Even today, it is very difficult to find a real teacher. Religion is leading people astray; everything we do today is serving demonic power (and I write this as an atheist). Even today, you are a slave but you do not see the master clearly.

All those answers are typically for blind people following wrong prophets - like Lemmings jumping down a cliff one after another. If you want to break through the circle of reincarnation or choose your future parents, you should start to feel again, concentrate to your inner conflicts, concentrate to your shakras and reconnect to mother earth. You would not believe what humans are capable of.

It must have been quite a session to have revealed multiple past lives. Was it a BOGO or unlimited access special? Whatever the reason you've chosen slavery, it seems your current life has bucked the trend. You'll have to wait on a few of your next lives to be sure, but, there may be a Queen, or King of the Universe in your future.

Maybe you enjoy imagining that there was always someone around telling you what to do so that you didn't have to take any responsibility for your own actions. 

Or maybe you're just not inventive enough to imagine yourself as a courtesan or a tight rope walker :P