t seems to me that as I get older my body likes different things. So I try to change things up for the guys, too.
After a few appointments with some guys my age and my guy who is older, I stumbled across a new 'thumbs-up' on a little more tooth on the tip, during BJ. Not that I would do it before asking or at least checking out a reaction to a first time.
So what I'd like to know, what else is there that I may be missing?  

If you do teeth, be sure to do so gently

a slow gentle approach with lots of licking, tongue swirling, and gentle suction to bring me to a mind-blowing eruption with CIM.

I nearly always have to ask her to go more slowly and much more gently. When it's fast and furious I become desensitized and can't feel anything.

I agree, slow and a great deal of attention to the underside of my tip.  I guess its an age thing.  I have had two providers do great with slow BBBJ.  Feeling the tongue on the bottom of my cock tip sends me over every time.

If you can "pull a golf ball through 50 feet of garden hose..."  

Love it slow and easy and as others have said with nice tonguing on the underside.  Also having the balls be a part of the action is nice.  I've also had several providers combining a bj with a prostate massage.  Wonderful experience

Yep I guess I usually go slow and easy with a bit of tease. I like to feel it get to the edge and then back off before it falls off the cliff. Well, if he likes it hard and strong I can go that way and actually if I'm working on a 2nd round it seems like that usually works the best for some.  
Now, on the other hand (or mouth) sometimes I think it is better not to back off if it is really, really close because it might not come back to the edge if it's been so close and I don't finish right then.
Aaahhhhh the many nuances of a good BJ.  
Thanks guys, you've given me good info and a twitchin' kitty. :

Exactly Right !    Nothing better than warm lips wrapped around your cock and gentle fingers at the bottom of your shaft while gently massaging the nut sack !   Can't hold back-don't want to hold back when that gets going-It ends too quickly - but it is the ultimate orgasm

As others have said, prostate massage and tongue swirling. Time spent just sucking on the head feels great too.  

.... as part of the BJ. But, then my sensitivity changes and that's when I like to tell the lady to switch to tongue and lip action only. I enjoy variation in sensations like having my balls slapped and then caressed gently. It's the journey that counts.

You are very correct in your comment of bringing him to the edge and not returning  

the way I like to explain it is for you to think off having something very sticky like a caramel candy stuck to the roof of your mouth. Think of how you would use your tongue to wear it down till you could remove it. Now replace that candy with  the head of my cock with the ribs of your upper pallet rubbing the rim of  the head and your tongue working on the bottom of the tip where the ring of the head flattens out. at the same time work the shaft with your hand and squeeze the base firmly. A few minutes of this and get ready cause here I CUM.

Teeth (gently of course) are great. So is slow, gentle and wet ball sucking. Most women never get into that but wow.