Every man has his hobbyhorse./ One man‘s meat is another man‘s poison.
萝卜青菜,各有所爱.
one radish, one hole -- each has his own task, and there is nobody to spare.
一个萝卜一个坑
Every pot, as the proverb has it, finds its cover.
就像谚语说的,一个萝卜一个坑儿.