I don't think the amount of cash paid is directly relevant, it does however put things into perspective.
Yes it can be tiring and annoying when someone needs a constant confidence boost, I'd probably actually tell him that I found it difficult to be with him if he needed me to say things to make him feel better, but that's me.
I am uncomfortable with calling clients names, sure I have "Mr such and such" but it's not a direct dig at something physical, unless it's Mr Smelly Armpits because he was asked to wash, but still had smelly armpits after washing. Needle dick is making fun of his small willy, which he can do nothing about.
I don't think that any of my clients are lower than me, or sad or needledicks or anything else and there are posts on the forum which do go along those lines. So long as someone is fine with me, I'm ok with them, they are human beings just as I am.
I have not had any experience I wish to blot out, so my experience is obviously quite different to some people here. Sure I've had some very difficult clients, but I've learned something from each one. I do not have a problem with giving a sexual service, or my time to clients who are absolutely fine with me. Sure some are more difficult than others, but I tend to negotiate around it.
Like Amy I had a variety of jobs before I engaged in sex work, and the bad days feel just the same no matter what the job or the pay. With this work I am my own motivator, and being in control, earning a good wage tends to outweigh those bad days. I do after all have some control over who I see, and how the booking goes.