OK, so if a bad mastering job is a no-job, maybe I should get my money back?
Maybe it's the places I've been working with, but the two albums I've sent to be mastered I was quite unhappy with. Maybe I'm expecting too much, but I was expecting them to properly correct the low end issues my mixes typically have because of my mixing room (way too much low end in my mixes, which I have been trying to correct but still haven't mastered). On one CD the low end disappeared on the master and the end result was trebly and dry, not warm at all. The other CD (different ME) was still too bassy. That CD also had a prevalent shrill, high "s" type frequency that I had hoped they would take out. I really should have taken it out myself, but it was everywhere, and i figured the ME would do it and his EQ would be better than my crappy plugins.
I also expected tasteful compression, but too often I would find that either quiet parts were too quiet, or little breaks where only one instrument is playing and which needed to meld into the next section (ie. the instrument needs to stay quiet) would be brought way up by the compression and stick out like a swollen penis.

In those cases I prefer the rough "masters" I did myself in which I applied my own overall compression and checked the song to make sure it actually sounded decent everywhere.
I'm fully ready to accept that part of the limitations here were my mixes, but then perhaps I should be doing the turd polishing myself where I can control all the variables, and do lots of different mixes until one is decent, rather than shipping my best mix off and trusting in some guy who doesn't seem to really listen to the music at all. Question mark.