I have to admit I love the "cuddliness" (is that a word?) the poly gives to a quilt. (plus is more affordable). So a win-win for me. I just see all the beautiful quilting done on "flatter" type batting and was wondering how to translate that to a fluffier batting (with my rudimentary skills!). :)

I do the same quilting on polyester batting as I do with cotton or wool. I don't tend to purchase high loft battings, when I have used tend to do a large, sweeping, open design.

Poly is more loftier than cotton, but you can get low loft poly, that may be what you need.

Poly comes in different weights and two poly bats in the same weight may have different feel to it. At my local fabric store, you can get a 5oz poly bat that is stiff, or on that is soft and nice. Probably people use the stiff kind for other things besides quilts. If you go to a quilt store, they, thankfully, only carry bats that are suitable for quilting.

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*** I use it for economy also & straight line quilt or shadow images.
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I am 75 percent done with a crib size quilt using poly and I do regular FMQ same as I do 80/20. It is loftier but still moves fine under the needle, especially on a supreme slider.

You are not limited. But, until you get a bit more comfortable, I suggest you continue with straight line quilting (not just STID but diagonals, cross hatching, etc) using a walking foot. When you feel more confident, then try some free motion quilting on small samples. I often start students on small pieces that they can make into placemats if they are happy with the result or discard without guilt if they are unhappy. Biggest thing - is to have fun! Don't push yourself and end up frustrated.

I mostly quilt with polyeaster batting, I do FMQ and straight stitch. I use high loft and I love it.

This is an interesting topic. I recently got some 60/40. The loft is low and I just love it. My only problem is that I can't remember where I got it. I want some more to use instead of the warm and natural. Anyone here know where I can get some more?

I like to use the one they sell with the interfacings, and have used that in over 95% of my quilts. It's gone up in price in the past few years. I can get intricate or quilt it 6=7" apart.