What do you think is the best position for tittyfucking?
Personally for me it’s either:
Wife sitting on the side of the bed with me standing up. This puts me at the perfect higher for her to push her boobs together around me and it’s a good position for me to do the thrusting.
Or
Me lying on my back with her between my legs. With her boobs hanging down a bit more she can really wrap them around me and in those positions she does the work until I cum.
Anyone else have any good ones?
Definitely your first option
From experience both work very well
Both are great. I do like when my OH sits across me while I’m laying on my back, pillows under his knees and him thrusting back and forth 
For those who like their prostate played with or rimmed at the same time I’d recommend a reverse position where you sit at your partners head and you control the titty play and they own your ass.
Depending on best position knees are either in front or behind the shoulders.
That is a nice position as well when you push your boobs together 
edited by mod
I agree with my soulmate @JGood totally here, it is a wonderful position.
My o/h never objects to how excited I get when she enthusiastically rims me as an occasional treat. Combining that with thrusting into her copious boobies doesn’t take long for me to finish at all, just as well as her neck aches a bit after a minute or so.
We got into various positions of boobyplay when we couldn’t enjoy penetration for a couple of years. However we still do it a lot, oten with a little bit of lube or massage oil, mmmm !
Any position that’s good for a blowjob and she’s below you will work.
Have you tried it with a wedge and your pelvis at the pinnacle of the wedge and your legs over the straight edge and your other half between them. With the angle you have a greater chance of making a mess on yourself at the end.
Our go-to is just wife on her back. I like to sit upright and support my weight on the headboard while she pushes her breasts together. Little coconut oil or silicone lube and it’s one of the best feelings ever. She likes to try and get the head of my penis in her mouth or even just catch it on her tongue as I thrust forward, too.
I’ll cast another vote for @JGood’s reverse position here. I love to alternate between rimming and teabagging while thrusting between her breasts with my hands free to play with her clit, maneuver a vibe, or go down on her.
That sounds very complicated, can you draw a diagram please ? 
I will see if I can do a SFW lovehoney style diagram for you 
Her sitting on bed or on the sofa and me standing up. Sometimes she will push her boobs together other time I push them together. She has very large boobs. We like to use coconut oil.
We hardly ever do this, which is a shame as my wife’s tits are the perfect size to accommodate me.
When we have done, I found sitting on the sofa with her on her knees, with a bra on, to be absolute heaven!