Here is a good collection of information about the addictive qualities of dairy products, and why they are so hard to kick. So many people tell me, "I couldn't be vegan because I could never give up dairy." There's a reason for that: it's addictive.
Back when I ate dairy, cheese and ice cream were two of my major binge foods. As a vegan, I continued to binge on soy or coconut milk "ice cream," and I found that Daiya cheese (especially those cheese blocks they have now) was almost as much of a problem for me as dairy cheese had been. I think it has to do with the texture and the fat, rather than the umami flavors, since I can eat other umami foods like miso and nutritional yeast (and Bragg's) and do okay. These days I don't eat ice cream or cheese, whether it's cow-based or vegan.