5" or longer. I hate shorter barrels. Certainly, I don't think other people shouldn't have them if they're what they want, but I detest the few I have. I like the guns otherwise and think about swapping a longer barrel on them. Otherwise, I might sell them.
Between 5, 6, 7, 8 inch, I haven't decided. For many reasons, the longer the better. But I have not carried all these lengths concealed regularly so couldn't say whether I would prefer a 7" or a 6". There is also the fact that particular gun models don't always come in every length so there are differences other than barrel length that come into determining preference. I think for the point of discussion, it suffices that I'm not in the snub-nosed camp nor in the 4" camp. My next revolver will be 7" and maybe that will be the one.