I hate eating fish on Good Friday.
Really. Is there a special reason for eating fish?
I don't like fish but eating it is tradition.
It is ok to not want to eat fish. You should know the practice comes from paganism along with supplying the English Navy during Elizabethan times.
Well that is interesting - I have no idea until you told me this even though I am a religious person.
Well while it might be tradition, you can stop eating if you don't like it. Forcing yourself to eat things you like just makes you hate it more.