First, glad you and your wife found someone she enjoys :) I know it started a bit rough!
I'm circumcised myself, and I've never seen an uncircumcised man 'in action'. My wife hasn't played with anyone who wasn't circumcised. So, no personal views on the subject either way.
As for vaginas, my experience has run the spectrum. I haven't found one aesthetic more pleasing than others. What matters far more to me is the woman's enthusiasm and enjoyment. As for breasts...once, a long time ago, I got to play with a woman who had a huge chest. I don't know what the sizes are beyond like EE or whatever, but she was beyond. Just enormous natural breasts. She was young too, so they were still quite perky. I was very curious to see her naked, and got my wish! But, her breasts were not sensitive in any sexual sense at all, and my playing with them felt no different to her than rubbing her pinky. It just did nothing for her. As a result, it didn't do much for me either after initial touches.