When Spirit was showing me my "Photo Album of past lives" they went back very far - to the Central Sun. There have been many migrations and many lives to get here to this earth. Uncountable numbers. And here on this planet I have chosen to be in body in every rising of civilization and all the experiments of evolution, some like Lemuria I had many many lives in, continuing a particular line of work for many lifetimes.
It's vaguely interesting. I'm old - I get it. lol
What's important is this life - this NOW.
Apparently no vast number of past lives makes me any wiser than the next person on the street. I still shoot myself in the foot regularly and stare at the smoking gun in my hand and ask "Why did I just do that?!"
Learning about past lives and ancient origins is just one stop on the Path. Novel, entertaining, helps explain a few things and occasionally is useful.
But over all... Here You Are. 
Do something interesting enough with this lifetime to at least get a snapshot or two in your own Past Life Photo album. LOL