This proverb means that different people like different things, or different people prefer different ways of doing things. I am unclear as to the exact origin of the phrase, but I would guess that the word "Strokes" in this proverb would relate to painting. Different people would prefer different brush STROKES when painting.

Mohammed is right. I am replying to answer provide a few more examples: "How many other people are coming?" This question may be asked when going to a party. It is implied that there will be many people there so you would use "other" which would mean outside the people speaking, how many more people would be at the party. "Can I have another piece of bread?" This is singular and can be asked when you have some bread, but want one more piece. "What is the other meaning?" Here "other" is a singular. Since it is "the other" it implies there is some other meaning to the word or phrase being asked about. Before this question, a person could ask "Is there another meaning?", which would expect a yes/no answer. Once you know there is another meaning, you can ask "what is the other meaning?"

I have heard both. For me as a native of West Coast of the United States I would probably say "Look who's talking! You are just as messy as me!". It has a sarcastic tone. For me, "Who do you think you are?" sounds less sarcastic and more aggressive. I might say "Who do you think you are?" to someone who cuts in line at the store if I am upset.

Hi. I am a native English speaker from the United States currently living in Shanghai. I would like to help you learn English if you can help me learn Chinese.