I should start by saying that none of my suppliers have done anything to make me think I am being annoying (yet)! - It's just a me problem!
As we get into having more detailed conversations with suppliers, I'm finding things that I need to question are cropping up more. I mean things like price changes with no apparent explanation, conflicting information on specifications for certain services (e.g. where changes have been made and the new description has been written down, but the old description has also been left on the proposal, potentially causing confusion).
I just HATE going back to them and questioning this stuff! I know there's a massive difference between being a difficult customer and legitimately questioning things, and people are more than happy tro clarify, but I can't help but procrastinate those emails where I need to ask for clarification!