I like liquidweb, except for their new smart vps... my old standard vps boxes outperform my smartvps with double the specs, among other setup issues.
I run others companies still to this day, and would recommend knownhost as well. Been with them for years. Occasionally they bring in new outsourced support staff that are dumb as bricks, but I've only had to scream (make a thread on WHT whereby a manager emailed me within the hour and resolved my issue) for a tier 3 tech one time. Ever since then my requests have been handled on par.
Wiredtree is good as well... not the greatest if you're having performance issues and need help (my experience only of course), but a solid host nonetheless.
Finally, I tried out Unixy for a very specific purpose and have been very satisfied. The owner is super knowledgeable and quick to jump on any problem. And, if you're making an unreasonable request, they are straight up and don't give you bullshit answers. If you run anything resource intensive and need caching, I would HIGHLY recommend them, specifically to run their Varnish plugin. (great for wordpress sites, large sites, autoblogs, etc... I'm not sys admin in any capacity, and they know how to tweak like a mother fucker)