The rejections were most commonly
1. Kind of just slightly boring or literally drawing the thing rather than being cool and artistic
2. Cool but similar to the artistic style of bios near it in the thread, whereas I wanted to keep it diverse (surreal followed by literal, oil followed by sharp lines etc) so it's more fun to scroll through
Whereas a few years ago generative models (GANs etc) would often render like static noise sometimes or completely wrong things. I've only seen that problem once with DALL-E across hundreds or thousands of images now (it generated a fully white image)