I had Skype a while back and at that time there was a lot of latency which made it unbearable for me. I've heard it has been improved, but I have been using Vonage for quite some time now and am happy with that.
Had the same problem with Skype having only two friends using it, who both lived in the UK which is a five hour time difference from EST so didn't get to chat much.
Live each day like it's your last. One day you'll be right.