How can I improve my work? (Slight NSFW)

I’ve been drawing my whole life, but I only really started getting good at it over the past couple of years. I still feel like my art is just lacking that oomph that would take it to the next level. Like, even with my most recent work, it just feels like it’s missing… something :(

Looking at my work, what do you think are my strengths and weaknesses? What stands out the most about my art, and where do you think I have the most room for improvement?

Suggestions / advice / comments are very much appreciated!