Quote Originally Posted by Hyoga
I understand well that -ka nickname is used frequently and usually even between man and woman...

And can I recognize you basically call friends/familiar people with those nicknames originated from the basic name? *except for the unique nicknames, etc. given by your frineds jokingly
I'm not sure you may call that a nickname. It's just one of the many forms every russian name has. And yes, we basicaly call each other by names. The convinience is you can chose the form of name that suits the situation the best.