I should start by saying that I'm far from being considered a connoisseur, but I've had enough blowjobs that I can differentiate and even sort them into categories.
All blowjobs are good, but some are better than others!
Basic blowjob - given before sex mainly to get a guy hard. This is good, but if the resulting sex is blasΓ©, so will be the blowjob. My experience here is that after you've you're your reciprocating; your soldier may need additional attention. The sex will be ok, because your pecker will harden, but not like it was just after leaving her warm mouth.
Blowjob as a part of 69 β this can be great, but it's difficult to concentrate while munching on your partners snatch. I've had few of this variety, but one I seem to recall is that my partner had a strange odor and I couldn't wait to right myself to just do her doggie style. There was nothing wrong, but certainly not what I'd consider magnificent.