I bet that the question depends more on management than the customers or type of work.

Like a good manager that doesn’t take shit from customers will be way better than the ones that bend over backwards for any complaint.

Same thing for the ones who are chill as long as things are getting done vs the one that is more interested in seeing the illusion of work being done even if things are neglected (because all their attention is making sure people look busy rather than really understanding the work to evaluate results).