My baby also did not like porridge. I tried to make porridge mixed with pumpkin and he still did not like it. Indeed, he vomited (I mean, vomited ... pouring everything from the stomach) every he had porridge.
During the past week, I tried again ... I tried to cook the porridge and add pumpkin + fish to the porridge just about 30 min before it was cooked. I then added 10 spoons of the porridge to his favourite cereal and he ate it just like normal ... he loved it! Bingo!!
I have try two rice cereal for my son, Geber & Nestle. He only have two tablespoon of Geber but he need more than three tablespoon if it is Nestle. Doctor said that there is only one brand of real rice cereal, that is Nestle!
My son love rice cereal mix with apple or pear very much. He can eat very fast if it is mixed with fruit.