Red is the desirable state of affairs, being the original hue as-struck. RB and BN coins lose value as a result, although as you mention personal preference plays a role. I, myself, very much like Brown Lincolns, partly because they're not going to turn on me. 
There isn't much rhyme or reason regarding which Cents will turn Brown - there are plenty of perfectly-preserved Flying Eagles and early Indian Heads in Red, while it's not tough to find a Brown 1970's Lincoln.
There isn't much rhyme or reason regarding which Cents will turn Brown - there are plenty of perfectly-preserved Flying Eagles and early Indian Heads in Red, while it's not tough to find a Brown 1970's Lincoln.

























