What makes for a "great" turntable?

"...rotational accuracy"

FWIW, this issue is, to me, the Achilles heal of the analogue process, whether inherrent problems arrive with the LP or is caused by the TT. I hear and can't stand pitch errors, especially obvious when listening to solo instruments on sustained notes. So I find that TT's that float my boat, are those with very heavy platters, unsuspended, and have isolated motors. Nottingham's use this design principle. At least that cures pitch problems with the TT, if not the source.

Folks who don't have 'perfect pitch' are blessed IMHO. :-)

I dont have perfect pitch as Newbee might, but I certainly can hear pitch modulation as well. mostly on poor pressings of some indie rock favorites of mine. It doesnt destroy my experience though.

I favor a turntable that isolates vibration, and acurately communicates the music. take it for what its worth, but you'll find yourself much more happy if you buy a good TT rather than a good looking TT. I prefer unsuspended from the few I've heard. There is a turtable for everyone out-there so have fun with it, it shouldnt be a stressful decision (but I have made it that way in the past).

Luckily though, I'm a sucker for almost all TT designs so I'm set on the asthetics. (except some of the high end clear-audio stuff--those are rocket ships not turntables)

Recently I went on eBay and ended up buying a Beogram 4500 with MMC-2 cartridge, both NIB. This table is a suspended design and while I was somewhat nervous about that, I have ended up being very pleased with this table to the point that I now use it exclusively. IMO it's not as good sonically as the non-suspended Scheu Premier I own, but it's darn close.

I think what has really surprised me about the Beogram 4500 is that I now spin more LPs than when the Scheu was in use. The Beogram has a linear tracking arm that just requires you plug in the cartridge and set VTF. Pitch is easy to set and has been pretty stable. One button cues the arm and drops the stylus down, then auto lift returns it at the end of the side. No issues with cartridge/arm matching, VTA, azimuth, etc.

I think the biggest hoot though is the built in RIAA equalizer so just plug the attached phono cable RCA ends into an open line input on the preamp. I was a little skeptical about the RIAA equalizer but everything is quiet and the sound is very good. To my surprise Peter at Soundsmith confirmed for me that the design of the RIAA equalizer is actually pretty good.

So while there may be better designs from a technical perspective, musically this is the greatest designed turn table I have ever owned. It's user friendly, sounds great, and is fun. As others have said, if it makes you enjoy the music...

There was a interview with A.J. Conti from Basis Audio in TAS I think.
He says it all.

Three things make it great: transient speed stability, isolation from external vibration, and ability to drain off internal vibration generated by motor & platter bearing. Few turntables get all three things right, and some of the top models that do, succeed by addressing the problem with an integrated plinth and rack system.