I've never made cheesecake with buttermilk, but I would think it would be very good. The recipe would quite obviously have to be adjusted for the additional liquid, but apparently it can be done. I Googled "buttermilk cheesecake" (with the quote marks) and had 821 hits, including a slew of recipes.
Your receipe sounds delicious and I am going to take a look in my kitchen to see if I have all of the ingredients. If not I will have to go to the market which I hate.
Knowing me it won't take long to finish it. I love bananas. If Jolie is a good girl I might even give her a small piece. I always just feed her dog food but one day I was eating a banana and I gave her a little piece. She loved it.
Keep coming with those delicious receipes of yours and have a great Sunday.