Hey, @nightfall, these are nice studies! Overall, I imagine you could be facing sobre difficulties with perspective and proportion. Remember that, if the head tilts up or down, the basic proportions should change accordingly. I’m attaching a draw-over with some additional notes. Please let me know if you have any questions. Hope this helps!

Really nice work--just remember to check that the side oval/plane aligns with the front plane in terms of perspective. The head can be simplified into a simple box shape, so that makes things easier to place when practicing different angles. Getting a good understanding and developing an intuition for this placement over repeated practice, like you are already doing, will give your drawings believability and dimensionality and overall a solid foundation for any style you choose to pursue. Hope this helps :)

Looks beautiful! The thing I would note is that the bounce light area (fourth value counting light to dark) on the pear is much lighter than in the original image--make sure the shadows are still shadows even if they vary in tone. The cast shadow also tapers off as it gets weaker, so you will see some of that 4th value on the edges as well.