Which ice cream cake flavor should I get?

My son has been seeing this foot doctor. I used to work for him. He does not charge a single dime to see him (which I feel incredibly guilty about by the way). He has been seeing him since October. Hopefully his time with him will end soon as his feet are much better (ingrown toenails). I took them some cookies and sweets from the local shop and they loved loved loved it. Now I would like to take them an ice cream cake from Baskin Robbins...but which flavor should I get????