I'm sure the angle is normal for a Nuthatch, but it is a little odd to look at. Good sharpness and nice BG. Wish the bird was looking at us, and I might tone down the perch.
These guys are alot of fun...I have a soft spot for Red-breasted Nuthatches (which looks identical to your nuthatches in Europe). I see nuthatches assume this pose very often but I agree this particular angle looks odd for an image - its too upside down. The body and face angling away from us doesn't help either. Good exposure and nice details.