Yucky Protein Shakes

Hi Everyone, I was wondering what kind of protein shakes everyone uses. I'm only 10 days post-op and having a really hard time drinking the protein. I am using permalean which I have found to have the best taste although when I drink It I feel that yucky sick feeling. My doctor doesn't mention it being ok to drink Ensure or Boost Protein? Do some of you use those? I'm going to call the nutritionist / Doctor today and ask about it!