How do you choose a turntable ?

I agree that setting up a turntable can be a daunting experience.
 

I decided a while ago, to become a “student” of the process. I bought a used smartractor, a mini microscope and an azimuth block with grid lines. 
 

Understanding VTF, VTA, rake angle, azimuth, overhang etc will allow you to understand which attributes contribute to the sound you are looking for. 
 

Then find a turntable and arm combination that allows for easy adjustment of these parameters. 
 

I still worked with my audio dealer, but instead of relying on him for everything, I learned how to be self  sufficient. I believe I get better sound from my turntable as a result. 
 

I went from a VPI Nomad & Soundsmith Zephyr moving iron cart to a VPI Prime 21 and Soundsmith Zephyr Mk3 moving iron cart.

Many say MC is the only way but that is narrow minded.

Running my tube phonostage, the sound is incredible & my table is like a work of art. Soundsmith rebuilds carts for a fraction of new cost.

Hey if remember buying a,new TT in 1973....and it wasn't easy then...all I know is cheap....sounds,cheap....buy the best you can....Belt or DD....good arm lift...I like automatic return....but I'm old.

If truly picking just the turntable, then pick one that is quiet with good speed accuracy and wow/flutter measurements. And then do you like the way it looks.  But imo the table has very little to do with sound, which is all that is important to me. The sound is really determined by the cartridge, arm and phono stage. 

A very interesting question for me at this time.  I have a Nottingham Ace Space with a 10 inch arm on a Townsend isolation platform.  I had upgraded to the heavy platter some time ago. I recently got clearance from my CFO to upgrade my VAC Signature 200 IQ amps to the VAC 300 IQ Mark II's-they will be installed later this week.  My Preamp is VAC Master with phono running Magico S7's.  I perceived my turntable to be the weak link in my system, so I queried AI what turntables would give me a substantial improvement from the Nott.  I was surprised to see that the recommendations included adding the Wave Mechanic speed controller and sticking with the Nott.  According to AI on that day I would have to spend a significant amount of money to see what sounded like to be a modest sonic improvement.  Sooo, I would say you should consider an isolation platform and upgrade to the heavy platter and consider the wave mechanic as well.