If you look at my previous posts (every 2 years! maybe it's a trend), you'll see that I've had my share of bad luck with hosts.
I've been with resellerscene.com since October 1st of last year, and what amazes me the most is their customer service.
Here are some examples of my support ticket histories:
sent: Thu, Oct 2, 2008 at 8:18 AM
reply: Thu, Oct 2, 2008 at 8:45 AM
Setting up nameservers.
sent: Thu, Oct 2, 2008 at 11:07 AM
reply: Thu, Oct 2, 2008 at 11:56 AM
reply: Thu, Oct 2, 2008 at 12:54 PM
I had just finished uploading my cpanel backups from my other servers, and put in a request to have them restored. Their reply was about how it has all been restored.
sent: Sat, Oct 4, 2008 at 1:28 PM
reply: Sat, Oct 4, 2008 at 1:50 PM
This one was about how one of my .htaccess kept redirecting itself, which got me IP banned from the server. They stuck with me and helped me troubleshoot the problem.
sent: Sat, Jan 10, 2009 at 12:48 PM
reply: Sat, Jan 10, 2009 at 3:30 PM
reply: Sat, Jan 10, 2009 at 3:42 PM
sent: Sat, Jan 10, 2009 at 3:55 PM
reply: Sat, Jan 10, 2009 at 4:04 PM
sent: Mon, Jan 12, 2009 at 4:41 PM
reply: Mon, Jan 12, 2009 at 4:48 PM
Here's a recent one:
Inquiry about my account details, marked low priority:
sent: Thu, Jul 23, 2009 at 5:37 PM
reply: Thu, Jul 23, 2009 at 5:40 PM
and so on.
I've had no trouble with their uptime, and they notify me ahead of time when there are server upgrades. Support is important for me not because many things go wrong, but because in the case that something does, or that I have questions about things, they're readily available to answer. I wholeheartedly recommend resellerscene.com to anyone who is looking for reseller hosting.