There are a lot of questions on the forum concerning bits. There is also a lot of good information on here so I would love to see it in one place. I think a lot of us would care to see what each of us is using and why.
I ride Western and my favorite bit has a Billy Allen mouth piece with tongue relief and calvary style shanks. I prefer it over others because of the lack of nutcracker design of the mouth piece as in a Tom Thumb and the swivel action of the shanks. I also like the fact that it is made of "sweet iron" that most horses prefer over stainless and the copper inlay which helps promote saliva.