I like Livecoin because it is clean and not cluttered with all kinds of java script dancing around you all the time. It is very secure and as of today, I have had not one issue with the site, all were of my own doing. Silly little things you know :)
So I have also used Cryptopia and I didn't care for it at all. I was wondering about Poloniex and Bittrex. Have you tried either of those? And if so what did you think about the services they provide?