I ran into a client today out "in public" -- he had just taken his first look at his draft and he chased me down to tell me this: "I read the draft and I'd love to meet the guy you wrote about." It was a compliment. He went on to tell me how great he thought the resume was -- how I captured exactly what it is he does (which was hard for me, because he's in IT, and I do *not* enjoy doing IT resumes) and what he has to offer his next employer.
That's what it's all about, isn't it? It's why we do what we do (besides the money, of course) -- it's the amazed look on the client's faces ... the excited phone calls when they get the job (especially, as one client recently told me, "Making more money than I've ever made before") ... and the relief when they figure out that you can help them. It's what makes up for the 2 a.m. I've-got-to-finish-this-draft-before-I-go-to-bed sessions, the PIA clients, the hassle of being our own boss.
Don't have a "kudos" folder yet? I recommend you start one. Look through it when you are working with a particularly difficult client, to remind yourself why we do what we do.