Interesting or Nice

What makes a person interesting to me? I have found if someone talks about work or money most of the time, I find them really boring. Is it their hobbies that make them interesting? Probably not, unless their hobbies are the same as mine which is not likely. Well,....what is it then? Is it something about their personality or some quality that I admire?

I am wondering because I have a lot of friends who come from completely different backgrounds than me. We don't share many common interests either. But I still like them because in the end they are just nice people....people who are sincere and reliable. I can count on them if I need help.

So what's more important? Being interesting or being nice?