To me its strange that some people differiate about the "likes" between professional and private life.
There are at least to levels which should be attended: the personality and the "intellectual factor". You can have a strictly professional/business relationship and it can last for years out of respect and mutual benefits. You don't have to get on a intimate level with a client, I even avoid it. This is called professionalism. Do your job as good as you can.
In my private environement I have also people I don't like so to say from a "personality check", but they might be intersting because we share interest and our relationship is based on this mutual interst.
Then there are friends, that's totally different. With them I like to share the mutual interest in the others person's life and well being.
In the end, its about which mutual interest you share. You don't have to be friends with everyone.
... and with people I don't share a mutual interst and which I can't stand, I don't share time, because my time is precious to me. And if asked, I tell it!