I love nissan because I believe that they have the best jdm cars because they make the gtr and silva and they are good for first cars to own.
I also like subaru because they have great off rode cars like sti's and stuff.
I believe that all the popular logos have their name in it so that you will always remember that. Dont have to ask what company that is because its right there. They also use bright colors or colors for mood like they say the color red makes you hungry so thats y u are more likely to stop at KFC when u see one.
If i had to have a logo for myself it would obviously be my signature with different colors. Like I choose black and gold because gold is sparkly and black goes well with gold.