This is my participation in the mini vegan contest:

The onion I use the most and the one I like the most is the white onion, especially in cooked dishes such as soups and sauces because it has a strong flavor that modifies the seasoning in food. I use purple onion very little in salads and raw dishes because it has a sweeter and more delicate flavor. So to answer the question, the onion I like the most is the white one and when it stings my eyes is when it is at its peak.