Well Pete, I looked at this post and I thought, with my dark sense of humour and general lack of empathy anything I say can only make things worse. So here goes:
One slight positive is from your PSA posts it does look like the cancer is gone. Not that any of us pessimists (realists) believe it is gone for good, but there is no point in worrying about it until it happens (I presume your not worried about a meteorite wiping out 90% life on earth, although that is a statistical certainty, one day).
When people say they have changed their diet, lifestyle, etc. because of cancer it concerns me. I think this is some sort of sackcloth and ashes response, that you need make penance because of the disease. Penance is pointless, and on health grounds it's too late (at least for this cancer, maybe not the next one).
If you enjoy the Mediterranean diet (I like all food) then eat it because you enjoy it, if you like dairy and meat eat them, life is too short to deny the pleasures we enjoy. Personally I don't believe in the land of milk and honey so I'm grabbing it while I can. Alcohol is great, not to the extent of sitting in the bus station at midnight with a can of strongbow (other ciders are available), but certainly above a moderate level. Smoking I've never been keen on, but with about 20 years left, I'd take it up if I enjoyed it. So I think you really should get back on the cheese and wine parties. I describe myself as a hedonist, though my friends say I'm just a grumpy old man, so I now have to say, I aspire to hedonism.
Anyway good luck, do what is right for you. Remember in a hundred years time no one will remember you existed, so live life now.
My twopence worth, though it'll cost you £2 after the mini budget.