Used HostGator many years ago when they were supposedly good on a reseller account. They were quick on Support but shit was always down. Would go down then I'd email them and they would say we kicked the abusing user off the server. Got old emailing them all the time cause they overloaded the servers or let any jackass abuse the shit outta them.
Personally
Liquid Web is the best I've ever used...
100% Uptime SLA, which I see month after month shit's never down
24/7 Phone/Email Support
Owned Data Centers, they don't have to call the data center for help as they own the fuckers, just walk over and fix shit quick
If I was ever looking to leave Liquid Web which I'm not as been flawless for years I'd look at ServInt etc... but never HostGator