I'm still pondering whether to add MBA to mine, but feel I'm not writing about business, so it's not really relevant, but then, I used to have one employer who said I had more letters after my name than he had in his name. This was actually part of a negative critique. I wasn't parading them. But I have all sorts of diplomas, degrees and professional qualifications in all sorts of things!

Like you, I don't mind writing them on my bio, but am currently reluctant to add letters to my name.

PhD is a good one though. Glad you've decided to add it.