My idle sits around 1400. Any lower and it'll almost cut out ifI I come to a sudden stop - dropping hard off the throttle.

The amount or rpm increase when you pull out the enrichment (choke) knob is very temperature dependent - both for the air temp and the engine temp.  When the air and engine are warm or hot, the mixture can become too rich with a full or partial pull on the knob  - and that will cause the engine to run rough and a drop in RPM at idle speeds will occur if you leave the choke on too long.

But as Gary suggests.......the first notch can be used to keep the idle speed up as the engine warms up - don't forget to push it in as the engine gets up to operating temp.

I believe my idle is set somewhere between 1,100 - 1,200.  When I ride I roll the throttle on/off, and I avoid "chopping" the throttle and letting it close quickly.......as that is a condition that makes the fuel mixture very lean and it can cause the bike to stall (The TEV is supposed to help avoid that but it doesn't prevent it completely).  If somebody pulls out in front of me or something happens fast and I chop the throttle and pull in the clutch while I grab the brakes......it is very likely the engine will stall.

My idle speed is set at 1100 rpm (warm) and I can close my throttle fully at any time without fear of stalling,and even between gears when sifting. If your idle speed is higher it 's because your slide is not closing fully ,your wasting fuel at idle,your gas mileage is lower. You should change to a larger idle jet ,that would allow you to drop to a lower idle speed and allow you to close the throttle any time without fear of stalling.