From what you believe, how many lifetimes or reincarnations do you think a Young Soul, Old Soul, etc. would have had?

I feel that quality may be more important than quantity, but just out of interest, I'd like to know your opinions.  

E.g. In a reading, MangoMom told me that she sensed I've lived around 15 lives.  What does this say about a person?  I'm aware it means a person has had many experiences, but in the wider scheme of things, I'm not sure where a number like '15 lifetimes' sits.

I don't know what anyone else considers to be a lot, but in my opinion that would be 25 lifetimes or more.  Each and every one of us has our own plans and our own number of incarnations - it wouldn't mean that anyone is better/stronger/wiser than anybody else.  Heck, some souls have only come down here to this hell-hole once !  And who can blame them !

And can't you just tell when you've across someone who's hardly learned anything at all?  It's like they're "Babyfied" or something, but it just feels like they're far behind you, ya know?

All I know is, this is my LAST life on this planet - beautiful tho it may be.

If you've only had 15 lives, it means you are a very young soul - 'baby' or 'infant'.  You are still new to the game.    Many of the older souls have had many, many lives.

A really good site to check out about soul age and info is michaelteachings.com.  Go to the menu item 'soul age' and read up.  It gives lots of info about the various ages and levels of the soul.

The Michael teachings is an interesting site. Personally I believe that the number of lives a person will live will be in the thousands, if the process even ends at all. I recall 100-200+ lives stretching back hundreds of thousands of years. I believe spiritual evolution is much like physical evolution in that it is a very slow long term process.