I agree every woman is different. I'm an analytical person, so theory helps me to better understand.
I've gotten few compliments (30%) on my skills,  assuming they are accurate - I'm not counting
Those fake Os - so It makes me think there is room for improvement.
In my situation, daty is only an option with providers, so it cannot be as often as I'd like, hence I want
To have some good advise so my learning curve accelerates. Life is short ...

There's another one I would actually recommend as well.  It looks like clips of it can be found under the "related videos" bit of the video linked to in the above post.  Some porn industry veterans all team up and provide insight and tips on "how to eat pussy like a champ."  I know Nina Hartley and Ron Jeremy are in it, Sunny Lane I think, and quite a few others that I'm forgetting.  Was helpful information for me as I've not had the opportunity to go down on a lady yet.  Hope to change that very soon!  So don't take my advice as personal experience, what I'll write up is some general info that most seem to agree on.

Most of these instructional bits though keep some of the same things in mind.  First, don't start off with an all out assault on the clit.  It's stressed that the same amount of nerve endings in a man's cock are found in the much much smaller clitoris.  AKA you can very easily overstimulate it.  It's best to start off with light kisses.  Kiss the boobies, and light kisses around the thigh area and around the clit.  Your indicator for how well you're starting off is how wet her panties get  Once she's more in the mood, then it's okay to start gently licking/sucking on the clit.  Again, don't try to overstimulate her.  Like other people said as well, every girl is different.  Some girls can get off with only clitoral stimulation, other girls may need a few helping fingers, some also like to get their pussy lips licked and sucked.  Obviously you can ask what she prefers, but the best way to figure it out for yourself is with how her body moves and her moans.  You'll know if you're doing a good job.