I actually just posted this in the Public Forum, in the "what is your favorite brand" thread, but thought the Ball-dedicated audience here might enjoy it as well.
First, I enjoy wearing and respect many brands, from forum favorites to the obscure and the unknown. That said, I can easily say that my favorite brand is Ball, and over the course of the last two decades, I have bought, worn and sold more than 70 Ball watches. And, it really has little to do with the tritium tubes--they're fine, but that's not why I like Ball.
My interest in watches got started when I received on my 21st birthday a Waltham pocket watch that my great grandparents had given my grandfather on his birthday in 1911. He worked on the railroad, and used this watch daily. It was later given to my father, on his 21st birthday, and then to me, and I subsequently gave it my son at his 21st--the fifth generation to own the watch. An interesting story behind all this (where the watch, and the people wearing them, have been over the last 100+ years), but discussed elsewhere on this site.
So, basically, I like Ball for its "yesteryear" ties to the past, in its associations with the railroad watches, manifested in similarly vintage-styled dial designs, found almost entirely in just one of their model lines, the Trainmaster Series, and to a lesser extent, the Fireman Series. And really, it is only those two Series that I really am drawn to, though I have tried a few in the other series.
Below are less than half of those that have slipped through my hands like quicksilver--the top row, however, is my current rotation, four Ball watches and one Sothis, a rotation which I have had for some time, as I am actually finally very happy with these, and have not been looking for anything else in quite a while now.