80-90% of my work these days is trash, It's annoying because I can't figure out what I'm doing wrong and how to improve it, I just feel like recently the quality of my work has dropped massively (apart from the odd image here and there) I hate this image below but can't really figure out what to do with it.
Oftentimes no one is more critical of art than the artist which created it. I know that feeling as well. This one has a solid foundation but the devil is in the details and I feel it's missing a number of those. This is going to be long and maybe a bit nit-picky but I'll run down the things that I think could be improved.
The pose is okay but it's somewhat unnatural for the couch she's sitting on as the armrest would be too short to rest against that way comfortably. An easy way to fix that would be to put a larger throw pillow behind her.
With weight in mind her heel should be sunken into the couch back. I think the pose could be improved by bringing the thighs closer together (closed even) and have them pushing more into the couch back as well while using a squish morph to simulate pressure on the side of the thighs. Back to the feet there could be some minor flexion at the ball of the feet or a higher arch to add some shape to the otherwise flat sole. And to go one final step further, on the very rare occasion that I have shown the underside of a characters feet I've used
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to add a little more realism since very few character skins have any bump/normal detailing there at all.
Again on weight and gravity, in that pose her leg size should taper out towards the upper thigh
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.
Another thing I noticed with the pose is the fingers. The left hand is fine but the right hand has the fingertips straight which they are almost never that way naturally, even flexing them inwards a few degrees helps a lot. I know it's a lot more work but I would also make a morph to add a slight pressure imprint on the thigh around the hand as it looks unnatural just kind of floating there and barely touching.
The last few things are really dependent on if you're trying to tell a story with the image or just making a pinup. If you're trying to tell a story then my immediate question is: Why is she naked but wearing fingerless gloves and an armband? It seems out of place. Personally I would get rid of those and opt to have a blanket or some clothing draped on the couch and have her looking up and to the right of the image as though she's just seeing someone she has been waiting for (extra detail: have the shadow of the out of frame person cascading onto the couch). As it stands I can't entirely tell if she's looking at the camera or not.
Sorry for the wall of text but I hope that helps somewhat. Otherwise I still think it's a great image that you've made!