I'm going to play devil' s advocate here and encourage you to have fun analyzing what elements take you where you want to go, even as you put together outfits that are fine. A turtleneck that falls low hip and is worn untucked creates a long upper body line and as it is knitwear, creates a large area of , say, body con and " layer- con" where any lapses in fit are more noticeable.
In tops, I've found it useful to separate the elements of neckline and length. First I've tried to identify which necklines are most flattering. And conversely a few types that just no longer look right. I don't buy those anymore, ever, no matter how gorgeous the color or low the price.
Just as there are perfect pant lengths , for me there are perfect top lengths that vary with what pants or skirt. Maybe sometimes there is a " universal" length but I found that proportions make I difference in my frump factor.
Finally, the neckline and length do interact for proportion, as above.
If you like how you look in a turtleneck from the standpoint of neckline, I would next experiment with the other proportions. You can play with the one you've got by turning up the hem, rolling or scrunching the sleeves, etc. What give it better proportion with the skirt? Does that top fit well everywhere or is there another brand that does? Remember, it's not our bodies that' are off in any way - it's that every top and bottom is cut differently and when you see the right one on you, you' ll see the difference.
Or, play with other necklines. Would a V - neck give you more of the look you're going for?
It took me a long time to figure out I was settling for fits and lengths that were not most
flattering because I was too impatient and impulsive a shopper AND because I just assumed there was nothing better. When I branched out more, saying, this fit isn't my best and it's not me, it's because I just haven't found it yet, I began to see okay , this year ____ brand has a ___ that's just right for me. Wait , and it will come.
This doesn't mean that every outfit I put on now is perfectly or equally fabutastic. It
means I think I have become a much better and more realistic critic of my own outfits so I can have a goal for new purchases or for re- mixing. Not to mention trying to keep learning, as from YLF, why things work or don't.