Since I work on a Mac, Hostingsource was an obvious choice. Their support is very friendly and they answer quickly. This company is better than that though, and their co-founder recently wrote a post outlining the issues they're having with the data center and the steps they planned to take to fix them.

If they can find a more responsive way to handle credible customer service tickets, they won't ever have any complaints from me, not even when they have the occasional glitch or hiccup.