one man's meat is another man's poison

One man's meat is another man's poison.
≈ что полезно одному, то вредно другому;
≈ что русскому хорошо, то немцу смерть;
≈ на вкус и цвет товарища нет {этим. лат. quod cibus est aliis, aliis est acre venenum то, что пища для одного, яд для другого}

Used to mean that something one person likes very much can be distasteful to someone else

Example 1: Fred: What do you mean you don't like French fries? They're the best food in the world!
Alan: One man's meat is another man's poison.

Example 2: Jill: I don't understand why Don doesn't like to read science fiction. It's the most interesting thing to read. Jane: One man's meat is another man's poison.(McGraw-Hill Dictionary of American Idioms and Phrasal Verbs)

Example 3: I wouldn't want to do her job, but she seems to love it. Oh well, one man's meat is another man's poison.(CIDI)

One man’s trash is another man’s treasure.

also
[о вкусах не спорят]
different strokes (for different folks) {informal}
used for saying that what is good or enjoyable for one person may not be so for someone else