Hi Carrau, thank you for sharing the information on oblique grinds; it was insightful!
Regarding wider oblique grinds like mine, such as an OBBB with a 30-degree oblique, it's obvious that rotating or canting the nib is necessary for proper writing. However, what isn't clear to me is the specific degree of rotation required to achieve optimal contact with the paper.
As a right-handed writer, I still find left obliques uncomfortable. I believe practice will improve this, but I naturally rotate or cant my nib to the right and I find this suites my writing even with straight nibs (EF or M; mostly italic grinds). My preferred oblique is a right-oblique EF or B italic, angled at approximately 6 degrees. I have no experience with other obliques, besides the three mentioned. Left obliques don't seem to complement my natural or preferred handwriting style.
Therefore, I'm considering if a modern left oblique, like an OBB or maybe even better a OB, might serve as a better starting point for me. I have experience and am comfortable grinding my own nibs but have never felt the urge to try a left oblique. The attached photo is my 1952 OBBB but the writing is with my EEF.